Flow Control Nozzles CNC Machining for Wafer Cleaning Systems

PEEK, PTFE, and stainless steel 316L are specifically chosen for cleaning nozzles for several reasons. PEEK offers great chemical resistance to acids, bases, and organic solvents. There is a maximum of a 1 percent weight change after 30 days of immersion, and PEEK maintains temperature stability to 250°C. This allows for heated chemical processing. PEEK also has great mechanical strength with a tensile strength of over 100 MPa and will prevent deformation under mechanical pressure. PEEK has low extractable contamination with metallic impurities below 0.1 ppb per cm² surface area, and great machinability with a surface finish below 0.8 Ra microns. This allows PEEK to achieve smooth flow characteristics. PTFE has great non-stick qualities to -200°C and 260°C and does not allow deposits to build up. Extractable fluoride levels are below 1 ppb, which also meets ultra-high purity guidelines. PFA also has great mechanical properties that allow for more complex shapes. With electropolishing, stainless steel 316L has ultra-high purity with metallic contamination to 1 ppb. It also has great pressure and thermal conductivity that allow for even temperature distribution. Hastelloy C-276 has great corrosion resistance and has a low corrosion rate to hydrofluoric acid and mixed acid solutions. It is below 0.01 mils per year and provides great chemical compatibility.

Using carbide micro-drills and diamond-coated tools to achieve spray orifice holes with diameters ranging from 0.1 to 5 mm and aspect ratios of 20:1. Prescribing tolerances as tight as ±0.002 mm. Micro-milling expands the internal flow channel complexity and optimizes the pressure drop, flow distribution, and width tolerances to ±0.005 mm. Thread milling constructs chemically resistant NPT, BSPT, and metric threads and other connections with pitch accuracy of ±0.010 mm. Precision turning CNC lathes produce cylindrical bodies of nozzles with diameter tolerances of ±0.008 mm and concentricity of 0.005 mm. Counter-boring accurately generates valve seat pockets and filter retainer cavities with depth control of ±0.015 mm. Cross-drilling, or cross-hole drilling, creates flow passages with control of positional accuracy to ±0.025 mm to form the intersecting flow. Wire EDM achieves ±0.003 mm tolerances along with precise slots and complex geometries in hard materials. Laser drilling creates micro-orifices and achieves diameter control of <0.1 mm with positional accuracy of ±0.005 mm. Surface grinding creates sealing surfaces with a control of flatness of 0.005 mm per 25 mm. Ultrasonic machining creates precise holes in ceramics and hard polymers and eliminates the need for sanding.

We maintain a tolerance of ±0.002 mm for the diameters of nozzles for which the flow rates must be delivered chemically with an accuracy of ±2 percent, concentricity of the orifice with respect to the nozzle centerline must be ±0.003 mm for symmetry of the spray pattern within ±2 degrees, a tolerance of ±0.005 mm for the internal flow channels must be maintained to control the design pressure drop to within ±3 percent, mounting threads made to the 2A/2B class with pitch diameter tolerances of ±0.010 mm ensures leak proof mounting of the chemicals with threaded connections, flatness of the sealing surface to 0.008 mm over 12 mm diameter to maintain O-ring sealing at 100 psi, ±2 degrees from design of spray angle, surface finish of wetted surface in flow control nozzles of 0.8 Ra microns, with chemical flow rates of 0.1 to 50 liters per minute, at an operating pressure of 5 to 100 psi, the spray patterns can change from a narrow stream to a wide fan with angles between 15 to 120 degrees, temperatures from ambient to 80°C can be used for heated chemical processing, and with droplet sizes ranging from 10 to 500 microns.

Yes, we provide rapid prototyping to verify fit and test assembly, with same-day CAD-to-part capability available for critical projects. For custom automation cells and research platforms, we perform low-volume production of 20 to 500 brackets. For standardized robot models, we perform high-volume production of thousands to tens of thousands of brackets annually, incorporating complete dimensional inspection, flatness verification, and material certifications.

Yes. Each of your components is manufactured in accordance with your documented quality system in compliance with ISO 9001. Materials are tracked, certified when applicable, and include polymer grades, chemical purity, extractable metals (as defined in SEMI C1 and C8 standards), and flow rate calibration to NIST standards. Other documentation includes dimensions compared to wafer cleaning system specifications, chemical compatibility and wet processing standards for SEMI C1, chemical purity in SEMI C8, SEMI F57 (materials of chemical distribution systems), SEMI S2 and S8 Safety, ASTM F1094 (microelectronics cleanroom wipers), ISO 14644-1 (cleanroom classification), and biocompatibility (USP Class VI), environmental (RoHS and REACH), and chemical distribution system material specifications (SEMI F57) with reliable materials that ensure stable flow and are chemically compatible for over 10 years with 50,000 spray cycles and exposure in cleanroom 1 to 1000 standards for spray cycles.

We provide comprehensive finishing solutions tailored to aerospace requirements:
Anodizing (Type II and Type III)
Passivation for corrosion resistance
Precision polishing for aerodynamic surfaces
Custom protective coatings and thermal barriers

Standard flow control nozzles from established wafer cleaning designs require 8–14 business days, including machining, surface treatment, flow testing, contamination analysis, and cleanroom packaging, while complex custom assemblies with multi-port configurations and specialized materials need 4–6 weeks, including spray pattern validation and chemical compatibility testing. Prototype nozzles for flow pattern analysis can be completed in 5–10 days, depending on material availability and surface finish requirements.

You can choose from many different types of finishes. These include, but are not limited to, diamond paste polishing to a surface finish of less than 0.4 Ra microns, precision polishing to remove microscopic scratches that trap particulates affecting the flow of material, stainless steel 316L surface finish electropolishing, stainless steel 316 passive chromium oxide layer formation with metallic contamination less than 1 ppb and surface finish less than 0.25 Ra microns, PTFE and PFA chemical etching for surface texture control, ultrasonic cleaning for machining residue removal and achieving under 0.1 particles 0.1µm per cm², plasma cleaning for decontaminating and achieving C with 5 monolayers layer of contamination, fluoropolymer coating on metal coating for chemical resistance with coating thickness of 25 to 100 microns, stainless steel passivation per ASTM A967, precision lapping achieving surface flatness of less than 0.002mm on sealing surfaces, vacuum baking for removing moisture and volatile control achieving outgassing rates of less than 1×10⁻⁹ torr·L/s·cm², cleanroom packaging in Class 10 environment with nitrogen purging for contamination control and during installation.

With the use of CNC machining, the control of orifice flow rate became accurate to within ±0.002mm and flow rate to ±2 percent. The accuracy of chemical delivery leads to the maintenance of uniform etch rates, effective cleaning, and repeatable processes, reducing wafer-to-wafer variation and yield loss by 1 to 3 percent. With CNC machining, the control of spray angle is accurate to ±2 degrees and achieves uniform coverage across the wafer. This means the entire surface area is treated, and edge exclusion zones, which may contain contaminants, are avoided. CNC machining reduces the roughness of flow surfaces, which optimizes internal flow geometries, leading to a 20 to 30 percent reduction of pressure drop and flow instabilities. With surfaces finished to a controlled 0.4 Ra microns, contaminants are generated 60 to 80 percent less, and nozzles can withstand more than 50,000 cycles before service is required. PEEK is strategically selected for the body of the nozzle as it provides mechanical strength and broad chemical compatibility. An electropolished stainless steel 316L body is used as it will provide an ultrahigh purity body with metallic contamination less than 1 ppb and will be chemically passive along with PTFE to aggressive solvents. Orifice concentricity to within 0.003mm promotes symmetric spray patterns and uniform processing on the surface.
To add metallic ions that could corrode devices and alter electrical functions without violating the extraction and contamination standards set below 1 ppb. The surface preparation and cleanroom assembly quality eliminate any instance of particle contamination and assure surface purity. Flow testing validation guarantees the precision of the exclusive manufacture and reliable wafer cleaning that supports the photoresist stripping and residue removal of more than 99.9 percent. Native oxide etching uniformity of < ± 2 percent across the entire wafer diameter, defect levels of particle removal below 0.05 particles >0.1µm per cm², RCA cleaning of metallic contamination closed to 1×10¹⁰ atoms/cm², solvent cleaning of organic residues and carbon contamination of below 5×10¹⁴ atoms/cm², and post-CMP cleaning of polishing residues of 5 to 10 year nozzle service life assuring removal of slurry particles and polishing residues provide great cleaning, uniformity in processes, and device yield optimization perfected in advanced semiconductor fabs, logic devices at the 3nm technology node, 3D structured memory devices with more than 100 layers, and specialty semiconductors that require ultra clean wafer surfaces to make high performance 5G RF devices, power semiconductors, MEMS sensors, and other high performance RF devices.