| HS Code | 804808 |
| Product Name | TOK TARF-6000 ArF Photoresist |
| Manufacturer | Tokyo Ohka Kogyo Co., Ltd. (TOK) |
| Product Code | TARF-6000 |
| Resist Type | Positive-tone chemically amplified resist |
| Intended Wavelength | 193 nm (ArF excimer laser) |
| Polymer Resin | Methacrylate-based polymer with alicyclic adamantyl groups |
| Photoacid Generator | Onium-salt-type photoacid generator |
| Application Method | Spin coating |
| Typical Developer | Aqueous 2.38% TMAH solution |
| Post Exposure Bake | Required for acid-catalyzed deprotection reaction |
| Etch Resistance | Enhanced by alicyclic units in the polymer structure |
| Transparency At 193nm | High transparency due to absence of aromatic chromophores |
As an accredited ArF Photoresist TOK TARF-6000 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | ArF Photoresist TOK TARF-6000 is supplied in 1-liter high-purity, light-resistant bottles, sealed and blanketed with nitrogen. |
| Container Loading (20′ FCL) | ArF Photoresist TOK TARF-6000 is loaded in sealed, cushioned containers into a 20-foot FCL, ensuring safe transport. |
| Shipping | Ship ArF photoresist TOK TARF-6000 in sealed, light-blocking HDPE or glass containers under inert nitrogen headspace. Keep away from UV and ignition sources. Transport refrigerated at 5–15°C, upright, protected from shock and humidity. Label as temperature-sensitive, flammable solvent-containing chemical. Ensure MSDS accompanies shipment and follow local hazardous materials regulations. |
| Storage | Store TOK TARF-6000 ArF photoresist in its original, tightly sealed container in a cool, dry, well-ventilated area. Keep away from heat, ignition sources, and direct or UV light. Store between 5–25°C. Avoid moisture, air exposure, and incompatible materials such as oxidizers. Ensure proper labeling and secure containment. |
| Shelf Life | Shelf life is typically 6 months when stored unopened at 5–25°C, protected from light and UV exposure. |
ArF photoresist TOK TARF-6000 enters logic front-end-of-line gate lithography as a ready-to-dispense 193 nm chemically amplified formulation loaded from certified bag-in-canister systems into a coater/developer track. In a 300 mm logic fab, the transfer line is purged with a PGMEA/PGME mixture before the first dispense, and the resist is applied without post-purchase compounding. The gate module operates inside a thermal budget where the post-exposure bake temperature must remain stable because the acid-catalyzed deprotection reaction that switches solubility in exposed regions is thermally activated. Published data for the exact TARF-6000 process window is limited, but typical ArF resist conditions in such a module include film thickness of 85–120 nm, softbake at 100–130 °C for 60–90 s, post-exposure bake at 100–130 °C for 60–90 s, and development in 2.38 wt% tetramethylammonium hydroxide for 30–60 s. The scanner side uses 193 nm immersion optics at numerical aperture 1.35 with off-axis illumination adjusted to the critical pitch.
Industry compliance standards in this segment include SEMI S2-0718 for coater/developer and scanner environmental health and safety, SEMI S8-0618 for chemical distribution and waste handling from the track, ISO 14644-1:2015 Class 3 for airborne particulate cleanliness during resist dispense, REACH Regulation (EC) No 1907/2006 Annex XVII for solvent and monomer restrictions, and RoHS Directive 2011/65/EU Article 4(1) for restrictions on terminal devices after packaging. Supplier quality is controlled under ISO 9001:2015 Clause 8.4.2 for external provision.
| Standard designation | Application boundary |
|---|---|
| SEMI S2-0718 | Track and scanner equipment environmental, health, and safety |
| SEMI S8-0618 | Chemical storage, distribution, and drain segregation |
| ISO 14644-1:2015 | Airborne particulate classification in lithography bay |
| REACH 1907/2006 Annex XVII | Substance restrictions for EU market compliance |
| RoHS 2011/65/EU Article 4(1) | Terminal semiconductor component restrictions |
| ISO 9001:2015 Clause 8.4.2 | Control of photoresist supplier and batch release |
Formulation addition ratio is zero at point-of-use: no additional solvent, photoacid generator, quencher, or surfactant is blended into TARF-6000 after the certified batch is released. The as-formulated solids ratio remains fixed, and the dispense volume for a 300 mm wafer is logged at 2.2–2.5 mL per wafer. Edge bead removal uses 0.6–0.8 mL of PGMEA/PGME dispensed at the wafer edge, and backside rinse uses 1.0–1.2 mL of solvent. Pre-wetting the wafer with PGMEA before resist dispense is not standard practice in front-end gate modules because it can perturb the as-coated thickness and reduce adhesion on hexamethyldisilazane-primed oxide.
Downstream production proceeds through hexamethyldisilazane vapor priming, followed by spin-coated bottom anti-reflective coating when the substrate reflectivity at the critical layer is high. TARF-6000 is dispensed under static or low-spin condition, spread at 300–800 rpm, and final-spun at 1500–3200 rpm to achieve target film thickness. After softbake, the wafer is exposed with a 193 nm immersion scanner using source-mask optimized illumination for the 40–80 nm half-pitch at nominal dose. Post-exposure bake is performed on a proximity hotplate with temperature uniformity better than 0.5 °C across the plate. Development uses a single-nozzle or linear-swing puddle of 2.38 wt% TMAH, followed by deionized water rinse and spin dry. Critical dimension measurements are taken with scatterometry or CD-SEM before etch pattern transfer.
Terminal finished products include 7 nm and 5 nm application processors, graphics processor dies, field-programmable gate arrays, and custom ASICs for data center accelerators. TARF-6000 is removed after etch or strip and does not remain in the semiconductor die.
In copper/low-k back-end-of-line dual damascene integration, the resist budget is constrained by the need to image via and trench patterns over ultralow-k dielectrics with a dielectric constant below 2.5. TARF-6000 must cover topography without fill-in defects, and the trench layer thickness is typically 200–400 nm on flat substrates, while via layers are thinner. The resist’s etch selectivity against silicon oxycarbide or hybrid dielectric stacks is limited; therefore the film is used only as an imaging mask, and pattern transfer is accomplished by a multilayer underlayer that absorbs the etch load. The main failure modes observed on production tracks are edge bead formation caused by solvent accumulation at the wafer shoulder and radial thickness variation over open low-k surfaces.
Industry compliance standards in this segment are SEMI S8-0618 for resist waste handling and drain segregation from copper CMP slurry lines, ISO 14644-1:2015 Class 4 or better for the lithography bay, REACH Regulation (EC) No 1907/2006 Annex XVII for organotin and restricted additives, RoHS Directive 2011/65/EU Article 4(1) with applicable exemptions for copper leadframes, and ISO 9001:2015 Clause 8.4.2 for audit of photoresist batch consistency.
Formulation addition ratio remains undiluted; however, in BEOL stacks the track recipe often logs a pre-wet dispense of 0.8–1.0 mL PGMEA/PGME before resist deposition to reduce radial thickness variation on the low-k surface. Total resist volume for a via-first dual damascene sequence is 4.8–5.4 mL per 300 mm wafer, with 0.5 mL edge bead removal solvent and no post-purchase dilution. If a topcoat is used in immersion mode, it is applied as a separate material and not mixed with the resist. Published data for TARF-6000 with specific immersion topcoats is limited and must be verified through the track supplier before setting a production recipe.
Via-first integration begins with dielectric etch stop layer deposition and ultralow-k film deposition. The via pattern is exposed in TARF-6000 over a spin-on organic planarization layer and silicon-containing hardmask. Following development, the resist pattern is transferred by dry etch through the hardmask and into the low-k dielectric. The trench pattern is then coated with the same ArF resist family but at a thicker target, exposed with ring illumination optimized for the trench pitch, and developed. Copper barrier and seed layers are deposited after etch, followed by electrochemical copper plating and CMP. Resist residues after strip must be minimized because metal contamination from the photoresist can increase line leakage in completed BEOL structures.
Terminal finished products are server CPUs, network switch ASICs, AI accelerator dies, and high-end routers where the number of BEOL metal layers ranges from 9 to 12.
When the storage node contact overlay budget drops below 3 nm in DDR5-class DRAM fabrication, the ArF resist’s post-develop CD uniformity becomes inseparable from scanner overlay and track temperature control. TARF-6000 is applied to storage node contact and bit-line contact critical layers, where contact pitch is tighter than the resolution limit of a single exposure and double patterning or sidewall-assisted patterning is introduced. The resist must retain a square profile and low scumming inside small contact holes; post-develop residue at the contact bottom produces etch blockage and storage node contact open failure. The scumming threshold is sensitive to quencher concentration, which is fixed in the as-formulated resist and cannot be adjusted downstream.
Industry compliance standards for DRAM contact layers include SEMI S2-0718 for production equipment safety, SEMI S8-0618 for chemical distribution and waste handling, ISO 14644-1:2015 Class 2 or Class 3 for the contact lithography bay, REACH Regulation (EC) No 1907/2006 Article 33 notification for substances of very high concern if present above 0.1 wt% in the formulation, and RoHS Directive 2011/65/EU Article 4(1) for the final packaged memory device.
At point-of-use, the formulation addition ratio is 0:1 solvent addition; TARF-6000 is not diluted. Dispense volume for the storage node contact layer is 3.0–3.4 mL per 300 mm wafer because film thickness is set between 150 nm and 220 nm to cover high topography from previous wordline and bitline structures. Pre-wet PGMEA volume is 0.8–1.0 mL and edge bead removal solvent is 0.5–0.7 mL. Batch blending on the track is prohibited; the resist is not mixed with bottom anti-reflective coating or topcoat, which are deposited as discrete films.
Downstream process flow includes silicon nitride hardmask deposition, optional spin-on carbon and silicon-containing anti-reflective coating, then TARF-6000 application. Exposure is performed on a 193 nm dry or immersion scanner depending on contact pitch; immersion mode requires topcoat compatibility. After post-exposure bake, development in 2.38 wt% TMAH removes the exposed regions and leaves contact hole patterns. Descum with a low-bias oxygen plasma follows to remove organic residue at the hole base, after which a dry etch opens the storage node contact through the dielectric stack. The resist is stripped in an ashing tool before subsequent polysilicon or metal fill.
Terminal finished product types are DDR5 SDRAM, LPDDR5X mobile DRAM, and HBM2E/HBM3 stacks, all of which rely on storage node contact lithography for cell array density.
In 3D NAND array edge modules, ArF resist TARF-6000 is applied to staircase trim and wordline cut levels where the substrate already contains alternating silicon dioxide and silicon nitride multilayers with total stack heights exceeding 2 µm. The wafer surface has large step height differences, so resist thickness over the edge dies differs from the center and the exposure focus latitude narrows. TARF-6000 must produce a resist film with enough thickness to survive the subsequent high-ion-energy etch used to trim the staircase, but not so thick that pattern collapse occurs at narrow trench dimensions. The key production failure mode is top-loss thinning at the highest topography step before the resist is fully cleared from the lowest step, which creates edge-die CD nonuniformity.
Industry compliance standards in this segment are SEMI S2-0718 for the lithography cluster, SEMI S8-0618 for point-of-use chemical distribution and drain lines, ISO 14644-1:2015 Class 3, REACH Regulation (EC) No 1907/2006 Annex XVII for organic solvent restrictions, and RoHS Directive 2011/65/EU Article 4(1) for the finished SSD component.
Formulation addition ratio is 0:1; no dilution or additive is registered in the coater track. Dispense volume is 2.6–3.0 mL per 300 mm wafer, with 0.6 mL edge bead removal solvent and 1.0 mL backside rinse. The target thickness is 100–130 nm on flat silicon flats, but actual thickness varies by up to 60 nm over the highest steps. The process is tuned to maintain the lowest step location above the minimum thickness required for etch resistance.
The downstream process includes resist coating over a silicon carbide or silicon nitride hardmask, exposure with an ArF scanner using conventional or off-axis illumination, post-exposure bake, and development. For staircase trim, the wafer is etched repeatedly; the resist edge is pulled back between etch steps, so the resist must withstand multiple etch intervals without excessive erosion or edge roughening. Wordline cut levels are imaged with similar resist and transferred by a high-selectivity plasma etch into the hardmask before the metal gate replacement. After pattern transfer, the resist is stripped in an oxygen plasma, and the wafer proceeds to oxide/metal fill.
Terminal finished product types include 96-layer and 176-layer TLC/QLC 3D NAND flash dies, enterprise SATA and NVMe SSDs, UFS 3.1 mobile storage, and data center storage modules.
Waveguide sidewall roughness in silicon photonics enters the optical propagation loss equation before the etched silicon ridge is encapsulated in cladding oxide. TARF-6000 is applied to pattern sub-200 nm rib waveguides, grating couplers, and tapers on silicon-on-insulator substrates. The lithographic line edge roughness of the resist is partially transferred into the silicon sidewall and contributes to scattering loss; therefore the process targets a smooth resist profile at the waveguide edge and minimal top loss after etching. Published data for TARF-6000 in silicon photonics sidewall roughness budgets is limited; process qualification on SOI is required before committing to a production recipe.
Industry compliance standards include SEMI S2-0718 for coating and exposure tools, SEMI S8-0618 for solvent waste segregation, ISO 14644-1:2015 Class 3 for SOI substrate cleaning and resist application, REACH Regulation (EC) No 1907/2006 Annex XVII for solvent restrictions, and RoHS Directive 2011/65/EU Article 4(1) for final optoelectronic components. Reliability qualification of the finished optical transceiver follows Telcordia GR-468-CORE for optoelectronic devices, while lithography process compliance remains under SEMI and ISO.
Formulation addition ratio is 0:1 downstream; TARF-6000 is not diluted because any change in solvent balance would shift the cast film thickness and may increase line edge roughness. For a 200 mm SOI wafer, dispense volume is 1.8–2.0 mL, edge bead removal volume is 0.4–0.5 mL, and backside rinse is 0.6–0.8 mL. For 300 mm silicon photonics wafers, dispense volume scales to 2.5–3.0 mL. No additional photoacid generator or quencher is added at point-of-use.
After cleaning the SOI wafer, a spin-on organic or inorganic bottom anti-reflective coating is applied when buried oxide reflectivity is high at the exposure wavelength. TARF-6000 is coated to a thickness of 100–180 nm, softbaked, exposed with a 193 nm scanner at the designed waveguide critical dimension, post-exposure baked, and developed in 2.38 wt% TMAH. The developed patterns are then transferred into the top silicon layer by a shallow anisotropic silicon etch, after which the resist is stripped. The etched silicon waveguide is cladded with silicon dioxide, and the wafer proceeds to metallization and passivation.
Terminal finished products include silicon photonic transceivers, co-packaged optical engines, automotive LIDAR beam-steering chips, and optical interconnects for data center switches.
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Tokyo Ohka Kogyo Co., Ltd. (TOK) identifies TARF-6000 as a positive-tone chemically amplified photoresist formulated for 193 nm argon fluoride excimer laser exposure. The resin platform uses methacrylate and acrylate copolymer backbones containing alicyclic lactone, polar methacrylic acid precursors, and acid-labile ester protecting groups. This composition differs from polyhydroxystyrene- or novolak-based 248 nm KrF resists because the 6000-series matrix avoids aromatic chromophores that absorb too strongly at 193 nm. TARF-6000 is therefore intended for critical and semi-critical layers where dry 193 nm lithography is employed. Published lot-specific formulation data for the exact TARF-6000 product is limited; the following parameters are platform-level ArF process ranges and should be verified against the TOK product datasheet before process qualification.
Viscosity is typically measured at 25 °C by a rotational viscometer method aligned with ASTM D2196, with TARF-series ArF resists commonly falling in the 1.5 cP to 3.5 cP range. The polymer is dissolved in a PGMEA-based carrier solvent; dilution ratio and polymer solids determine the coated film thickness. Film thickness can be set from about 200 nm to 400 nm on a spin coater with typical spin speeds between 1,500 rpm and 3,500 rpm, depending on bowl exhaust and coater/developer track configuration.
On 300 mm wafer coating tracks, TARF-6000 is dispensed through point-of-use filtration at 0.1 µm or finer. Pre-wet solvent is used to reduce resist usage and improve coating uniformity; the pre-wet must be matched to the resist solvent system to prevent precipitation at the wafer edge. Coating non-uniformity is typically monitored after soft bake by spectroscopic ellipsometry, with a mean thickness control limit near ±2 nm 3σ on bare silicon. Production experience on enclosed coater/developer systems shows that cup exhaust balance, backside rinse timing, and edge bead removal cut width are the most common sources of thickness variation. Edge bead removal solvent can shift the edge profile and, if the cut width is too narrow, residual edge bead can lift during development and generate defect excursions.
Soft bake conditions for ArF chemically amplified resists generally fall in the 90 °C to 110 °C range for 60 s to 90 s on a proximity hotplate. The soft bake removes carrier solvent and stabilizes the film; insufficient bake leaves residual solvent that can alter acid diffusion and film loss. Post-exposure bake is typically 110 °C to 130 °C for 60 s to 90 s. During PEB, photoacid catalytic deprotection converts the exposed resin to a more base-soluble state. Exact temperatures for TARF-6000 must be taken from the product datasheet; a PEB temperature deviation of ±2 °C can shift critical dimensions in isolated and dense features because deprotection kinetics are thermally activated.
Development is performed with 2.38 wt% tetramethylammonium hydroxide in a puddle or spray process, normally 30 s to 60 s, followed by deionized water rinse and spin-dry. The dissolution contrast of TARF-6000 depends on the acid-labile protecting group ratio and lactone content. Unexposed film loss in the developer, often called dark loss, must be limited to a small fraction of the initial thickness; excessive dark loss reduces the usable resist budget and degrades line-edge roughness. Developer puddle temperature is controlled at 23 °C to 25 °C in production settings, because development rate varies with temperature and can create CD non-uniformity across a wafer batch.
Airborne molecular amine contamination is a critical process boundary. Amines neutralize photoacid at the resist surface and produce T-shaped profiles or scum. Production lines running TARF-series ArF resists usually require chemical filtration of cleanroom air and track enclosures, with operator exposure to amine sources such as certain construction materials or cleaning agents restricted. If amine levels remain above 5 ppb to 10 ppb and the post-exposure delay exceeds 15 min to 30 min, CD drift and surface inhibition may appear. TARF-6000 is designed for dry ArF exposure; immersion compatibility should not be assumed unless a specific immersion-grade formulation is designated.
The performance envelope of TARF-6000 is set by resist contrast, photoacid generator acid diffusion length, and the dry-etch resistance of the alicyclic methacrylate film. Clearing dose and sizing dose for TARF-series ArF resists depend on film thickness, illumination mode, and mask bias; published typical sizing doses for similar 193 nm chemically amplified methacrylate resists are in the 15 mJ/cm² to 35 mJ/cm² range, with clearing doses below 10 mJ/cm² to 20 mJ/cm². Acid diffusion is controlled by the polymer free volume and the size of the photoacid anion; TARF-6000 uses lactone and polar substituents to reduce acid migration relative to early ArF formulations. This reduction improves line-edge roughness but can also lower sensitivity and require higher post-exposure bake temperatures. Excessive lactone content raises the dark dissolution rate and contracts the development window; excessive acid-labile group density may raise dose requirements and reduce exposure latitude.
Line-edge roughness is measured after development by scanning electron microscopy or atomic force microscopy, with production values generally reported as 3σ line-edge roughness. Process development for TARF-6000 therefore balances acid diffusion and dissolution contrast. Under normal processing, a pattern collapse limit occurs when high-aspect-ratio lines are rinsed and dried: the capillary force between adjacent lines increases as space width decreases and as film thickness increases. In practice, film thickness above 350 nm for dense line/space patterns can be difficult without a lower-surface-tension rinse fluid or a hard-mask strategy. Film thickness below 200 nm improves resolution and focus latitude but reduces the etch budget for direct substrate etching.
Etch resistance in TARF-6000 is not based on aromatic ring density as in KrF resists, but on the carbon-rich alicyclic structures such as lactones and adamantyl groups. These structures provide dry-etch durability under fluorocarbon and chlorine plasma conditions while maintaining optical transparency at 193 nm. The trade-off is that methacrylate resists are typically coated thinner than their KrF counterparts; etch recipe re-optimization is required when TARF-6000 replaces a thick PHS resist in metal or contact layers.
On integrated coater/developer systems such as the Tokyo Electron CLEAN TRACK ACT series and DNS SFP series, TARF-6000 has been evaluated for throughput and defectivity. In these systems, poor edge bead removal solvent drying can leave a residue that is subsequently spread during the developer rinse and appears as satellite defects at the wafer edge. Exhaust imbalance in the coating bowl can create a radial thickness gradient; the thickness gradient across 300 mm wafers is often measured by a multi-point ellipsometer and controlled to less than ±1.5 nm 3σ. The coater/developer hotplate temperature recovery time is important for PEB uniformity: if the hotplate door opens and closes too slowly, the wafer edge may lose thermal budget relative to the center, causing a characteristic edge CD signature. Production hotplates for chemically amplified ArF resists are therefore specified with temperature uniformity better than ±0.5 °C and recovery times below 5 s. The resist pump dispense volume and suckback valve timing affect the presence of micro-bubbles, which can generate comet-shaped defects after development. Filtration at 0.1 µm removes gel particles, but a poorly primed filter can introduce microbubbles; dispense lines are kept free of dead space and are purged after filter changes.
If TARF-6000 is introduced into a production flow that previously used a KrF polyhydroxystyrene resist, the following differences should be controlled. First, the exposure wavelength changes from 248 nm to 193 nm, which reduces the minimum printable feature size but also reduces depth of focus for a given numerical aperture. Second, the film thickness is typically reduced from 500 nm to 900 nm for KrF to 200 nm to 400 nm for TARF-6000. Third, the developer remains 2.38 wt% TMAH, but the dissolution mechanism changes from phenolic group switching to acid-catalyzed deprotection of methacrylate ester groups. Fourth, the etch-resistance mechanism shifts from aromatic rings to alicyclic carbon density, which may require changes in etch gas ratio or hard-mask stack. Fifth, the formulation is more sensitive to post-exposure delay and airborne amine contamination because the photoacid is a strong acid in a non-phenolic matrix. A structural comparison is provided in the following table.
| Parameter | TARF-6000 ArF platform | Typical KrF PHS positive resist |
|---|---|---|
| Exposure wavelength | 193 nm | 248 nm |
| Primary polymer class | Methacrylate/acrylate with alicyclic lactone and acid-labile esters | Poly(4-hydroxystyrene) or novolak/PHS blend |
| Typical coated film thickness | 200 nm to 400 nm | 500 nm to 900 nm |
| Developer | 2.38 wt% TMAH | 2.38 wt% TMAH |
| Optical design driver at exposure wavelength | Low absorbance below about 0.2 µm⁻¹ | Low absorbance at 248 nm; high absorbance at 193 nm |
| Dry-etch resistance mechanism | Alicyclic carbon and lactone/adamantyl units | Aromatic ring carbon density |
| Amine sensitivity | High; post-exposure delay and airborne amine control required | High but often less surface-sensitive due to PHS dissolution pathway |
The use of TARF-6000 in contact or via layers requires qualification of etch selectivity and line collapse margin. Shrinking the resist thickness from 600 nm to 300 nm halves the sacrificial layer available for etch unless the etch selectivity is improved or a hard mask is inserted. In addition, the TARF-6000 film transmits more 193 nm light but may require an organic bottom anti-reflective coating to suppress substrate reflectivity and improve CD control over topography. The bottom anti-reflective coating must be selected for compatibility with the resist solvent to avoid intermixing; typical processes use a bake step between bottom anti-reflective coating and resist deposition.
Like other ArF photoresists of its generation, TARF-6000 uses chemically amplified deprotection. Differences between TARF-6000 and earlier TOK ArF materials are expressed through photoacid generator loading and the ratio of protecting groups to polar units. A lower photoacid generator loading with a larger acid anion can reduce acid diffusion and improve line-edge roughness, but it can lower photospeed. A higher photoacid generator loading raises acid yield and dose sensitivity but may increase diffusion. TARF-6000 is generally selected when a balance between resolution, sensitivity, and etch resistance is required. In comparison to non-TOK 193 nm methacrylate resists, the TARF series is distinguished by its alicyclic methacrylate composition and developer-soluble polarization; however, direct comparative data should be generated on the target scanner and track because resist performance is strongly coupled to illumination conditions, mask error, and substrate stack.
Storage and handling are critical for maintaining lot-to-lot consistency. TARF-6000 should be stored in sealed high-density polyethylene or glass containers at 5 °C to 25 °C, away from ultraviolet light and moisture. Point-of-use filtration to 0.1 µm or finer is recommended. The product should not be mixed with amine-based additives, alkali strippers, or metal-containing adhesion promoters without TOK approval, because these materials can deactivate the photoacid generator or alter the dissolution rate. Water content and viscosity are monitored from each lot; a viscosity shift outside the specified range can change film thickness at a fixed spin speed. Particle counts are controlled by laser particle counting, and trace metal levels are tested to avoid electrical defects in front-end layers.
TOK TARF-6000 is manufactured under a quality management system registered to ISO 9001:2015, with environmental management according to ISO 14001:2015. Safety data sheets are prepared in accordance with REACH EC 1907/2006, Annex II. If applicable to the end product, the material is subject to review under RoHS Directive 2011/65/EU for restricted substances. The following matrix summarizes the main compliance and control documents.
| Standard or regulation | Designation | Application to TARF-6000 |
|---|---|---|
| Quality management | ISO 9001:2015 | Lot traceability, incoming QC, nonconformance control |
| Environmental management | ISO 14001:2015 | Manufacturing site environmental controls |
| Chemical safety data sheet | REACH EC 1907/2006, Annex II | SDS content and hazard communication |
| Restricted substances | RoHS Directive 2011/65/EU | Lead, cadmium, mercury, hexavalent chromium, PBB, PBDE restrictions where applicable |
| Viscosity test method | ASTM D2196 | Rheological lot acceptance |
Lot validation for TARF-6000 typically includes film thickness test, viscosity, particle count, water content, trace metals, and a lithography check wafer processed on a qualified ArF scanner. The lithography check wafer validates photospeed, CD uniformity, isolated-dense bias, and line-edge roughness against reference data. If the product is used after freezing, it should be brought to ambient temperature in a controlled manner and slowly rolled or agitated according to TOK instructions before dispensing. Filtration equipment should be compatible with the PGMEA-based solvent and should not introduce metal or particle contamination. The operational boundaries for TARF-6000 include the recommended bake temperature ranges, post-exposure delay limits under controlled amine levels, and developer concentration tolerance around 2.38 wt%. Deviation outside these boundaries can produce scumming, T-topping, pattern collapse, or CD drift.
