Applications of Semiconductor Process Chemicals in Industrial Manufacturing

We supply semiconductor-grade process chemicals for critical and advanced downstream applications across the electronics and semiconductor industries. Our materials support large-scale production, stringent compliance protocols, and integration with specific wafer-fabrication, packaging, and assembly techniques.

1. Wafer Cleaning Solutions for Integrated Circuit Fabrication

Wafer cleaning is a key stage in integrated circuit (IC) manufacturing, removing particles, organics, and metal contaminants from silicon surfaces before photolithography and etching. High-purity chemicals such as sulfuric acid, hydrogen peroxide, ammonium hydroxide, hydrochloric acid, and isopropanol enter this process. These blends ensure defect-free surfaces and high device yield. Stringent contamination controls and trace metal requirements apply, and consistency between batches is vital for process repeatability and end-product reliability.

Industry compliance standards

• SEMI C1 (Specifications for High-Purity Chemicals in Semiconductor Manufacturing)
• ISO 9001:2015 (Quality Management Systems)
• IEC 61340 (Electrostatics Control for Semiconductors)
• SEMI E49 (Facility Chemical Delivery Systems)

Typical usage ratio

• SC-1: NH₄OH:H₂O₂:H₂O in 1:1:5 to 1:2:10 (by volume), based on particle load
• SC-2: HCl:H₂O₂:H₂O in 1:1:6 to 1:2:8, adjusted for metal ion removal
• Sulfuric acid:hydrogen peroxide mix (SPM) at 3:1 to 4:1, depending on organic load

Downstream process integration

• Applied after wafer saw and prior to photolithography or gate oxidation
• Slotted into batch or single-wafer automated tools
• Follows mechanical cleaning stage for additive removal
• Includes post-clean DI water rinse and dry step integrated into tool process

Final product types

• DRAM and NAND memory devices
• Microprocessors and microcontrollers
• CMOS image sensors
• High-frequency RF chips

2. Photolithography Developer Chemicals for Pattern Transfer

Photoresist developers based on tetramethylammonium hydroxide (TMAH) and proprietary aqueous-alkali blends form a core material in transferring mask patterns onto wafers. These developers deliver high contrast, edge acuity, and low defectivity during sub-20 nm process flows. End-users require stable chemical composition and low ionic/particulate levels to maintain process window tightness and high-volume manufacturing (HVM) throughput.

Industry compliance standards

• SEMI C41 (Standard for Photoresist and Photolithography Chemicals)
• IATF 16949 (Automotive Semiconductors—when used in automotive ICs)
• ISO 14001 (Environmental Management)
• RoHS Compliant (Restriction of Hazardous Substances)

Typical usage ratio

• Developer concentration: 0.20 to 0.26N TMAH, depending on resist supplier guidelines
• Application ranges: 500–2000 mL per 200 mm wafer; adjusted based on batch tool type
• Rinse ratio: 5:1 to 10:1 DI water:developer, site-dependent

Downstream process integration

• Applied directly after UV exposure in spin, puddle, or spray mode
• Automated chemical dispense integrated in lithography tracks
• Post-develop rinse and dry performed in sequence to minimize pattern collapse
• Subsequent etch or ion implantation step follows pattern develop

Final product types

• CMOS logic circuits
• Display driver ICs
• ASICs and FPGAs
• Analog/mixed-signal chips

3. Wet Etching Reagents for Pattern Transfer and Device Definition

Critical and custom-blended etchants, such as buffered oxide etchants (BOE), phosphoric acid, and mixtures of nitric and hydrofluoric acids, support precision layer removal and device isolation steps in semiconductor foundries. We manufacture electronic-grade etchants to achieve controlled silicon oxide, nitride, and polysilicon thickness reductions, providing process engineers with etch rate consistency, precise selectivity, and low metallics for advanced process integration.

Industry compliance standards

• SEMI C35 (Testing for Etch Chemicals Quality and Contamination)
• IEC 62474 (Material Declaration Standards)
• ISO 45001 (Occupational Health and Safety Management)
• SEMI S2 (Environmental, Health, and Safety Guideline for Semiconductor Manufacturing Equipment)

Typical usage ratio

• BOE: HF:NH₄F in 1:6 to 1:10, selected by layer thickness and selectivity
• Phosphoric acid: 75–85% concentration, used above 150°C for nitride removal
• Mixed acid etches (e.g., HNO₃:HF): 10:1 to 20:1, customized for junction depth

Downstream process integration

• Inserted after photolithography develop for oxide, nitride, poly removal
• Deployed in batch wet benches and single-wafer wet stations
• Feeds directly into pre-diffusion or deposition steps
• Etch residue removal (post-etch cleans with proprietary acids/solvents)

Final product types

• Silicon-based power devices (IGBTs, MOSFETs)
• Passive components within ICs
• LED wafers
• Analog front-end chips

4. CMP Slurries and Post-CMP Clean Chemistries for Planarization

Chemical mechanical planarization (CMP) slurries rely on precise mixtures of nanosilica, alumina, hydrogen peroxide, and stabilizers to polish surface topography and achieve nanometer-scale uniformity. Post-CMP cleaning steps utilize amine-based or acidic blends to eliminate residual particles and metal contaminants. Our formulations support copper, tungsten, and oxide CMP within 300 mm fabs, with tailored chemistry for various dielectric and metal layers.

Industry compliance standards

• SEMI M1 (Specifications for Wafer Surface Quality)
• SEMI C24 (Polishing Materials and Ultrapure Water Requirements)
• IEC 60529 (Protection Against Particle and Liquid Intrusion)
• ISO/TS 16949 (Automotive Semiconductor Process Control)

Typical usage ratio

• CMP slurry: 2–10% abrasive solids, adjusted for removal rate and selectivity
• Hydrogen peroxide oxidant: 0.1–0.5%, tuned for intended metal polish rate
• Post-CMP cleans: 0.5–2% amine or acid components, dictated by wafer residue load

Downstream process integration

• CMP slurries dispensed directly to copper, tungsten, or oxide platens
• Abrasion and chemical etch combined for planarization
• Immediate transition to post-CMP clean module using matched chemistries
• Polished wafer sent downstream to metallization, passivation, or dielectric deposition

Final product types

• Advanced logic processors
• System-on-Chip (SoC)
• Wafer-level chip scale packages (WLCSP)
• High-bandwidth memory devices

5. Ultra-High Purity Wet Chemicals for Compound Semiconductor Production

Gallium arsenide (GaAs), silicon carbide (SiC), and indium phosphide (InP) device manufacturing leverages ultra-high purity acids, ammonias, and solvents for epitaxy cleans, substrate etching, and device passivation steps. Our production lines meet the purity demands of RF, optoelectronic, and power device foundries, minimizing background doping, particle contamination, and chemical residues that directly affect device performance and long-term yield.

Industry compliance standards

• SEMI C93 (Specification for Ultra-High Purity Chemicals for Compound Semiconductors)
• ISO 14644 (Cleanroom and Controlled Environments)
• JEDEC JESD94 (Quality and Reliability for GaAs Devices)
• IEC 61249 (Assembly and Device Safety)

Typical usage ratio

• Ammonia-based cleans: 1–5% aqueous, customized to surface and device design
• Hydrochloric/parasitic acid etches: 2:1 to 8:1 dilution, based on substrate thickness
• Solvent cleaning (acetone, methanol, isopropanol): 100% or sequential mixture, as prescribed

Downstream process integration

• Applied at pre-epitaxy wafer clean before MOCVD or HVPE
• Integrated post-implanted anneal cleans
• Final device passivation and dicing residue removal
• Batch and single-wafer protocols enabled by chemical delivery systems

Final product types

• RF transceivers for mobile and satellite applications
• Laser diodes for fiberoptic networks
• SiC power MOSFETs and diodes
• Photodetector arrays for optical sensing

6. Solvents and Strippers for Wafer-Level Packaging and Assembly

Advanced packaging processes, including wafer-level encapsulation, redistribution layers (RDL), and die-attach, deploy high-purity NMP, MEK, and proprietary formulated solvent blends to strip photopolymers, flux, and thermal adhesives without damaging underlying structures. Control of ionic impurities and drying rates remains critical to device reliability for flip-chip, fan-out, and 2.5D/3D stacking applications. Our specialty solvents meet the compatibility and safety needs of large OSAT facilities and IDMs alike.

Industry compliance standards

• SEMI C62 (Specifications for Packaging Process Chemicals)
• IPC-A-610 (Acceptability of Electronic Assemblies)
• REACH SVHC (European Chemicals Regulation for Substances of Very High Concern)
• JEITA ET-7004 (Environment, Health, and Safety for IC Packaging Processes)

Typical usage ratio

• Wafer strip solvents: 70–100% purity, application via immersion or spray
• Photoresist removers: 10–20% aqueous NMP, adjusted by polymer thickness and process temperature
• Encapsulant cleaning: 2–10% solvent blends, selected for package stack compatibility

Downstream process integration

• Applied post-cure in RDL and wafer-level CSP lines
• Process steps include immersion strip, ultrasonic assist, and precision drying
• Used before final reliability testing and package singulation
• Integrated into automated chemical management systems in OSAT and IDM packaging fabs

Final product types

• Fan-out wafer-level packages (FOWLP)
• Flip-chip ball grid arrays (FC-BGA)
• 2.5D and 3D TSV-integrated semiconductor packages
• MEMS and sensors in advanced module assemblies