Effective, reliable, filters.
Improving PCB Substrate Cleanliness to Decrease Surface Defects and Improve PCB Electrical Quality
Pall Wet Etch Clean Filters are designed for wet etching, stripping, developing and cleaning applications for making PCB substrates. Cleanliness solutions are available for different sterilization systems like recirculating chemical baths, high pressure jet sprays, and mechanical scrubbing systems used in PCB manufacturing.
Membranes are offered in a wide variety of materials (polysulfone, polyether sulfone, polypropylene, ECTFE, PTFE and non de-wetting PTFE) to meet the particle removal needs specific to the PCB substrate sizes. Customizable filters are designed to handle flow rates in excess of 300 LPM with a minimal footprint, to help reduce PCB manufacturing costs. High flow rate applications can effectively reduce and prevent defects from reaching the substrate surfaces while meeting the required removal retentions.
Effective filtration is essential for keeping chemical baths free of particles in order to etch and clean the PCB substrate effectively. In the presence of moisture, a common etchant HBr can corrode the 316L stainless steel that is typically used as the material of construction for a plasma etch tool’s gas delivery system. Corrosion can then lead to the formation of both particles and volatile metal compounds that can interfere with the PCB functions. Particle formation can result in particle contamination on the PCB surface and mechanical failure and leaks in the gas delivery system.
Pall recognizes that different applications have different fluid cleanliness and filtration requirements; the Pall range of Melt Blown filter products is simply defined to help choose the best solution at the most economic cost. Meltblown Products are designed for cleanliness control applications where the full range of solid contamination removal including silt is required. Cleanliness control in wash applications, machining applications where high surface finish is required, single pass in-line last chance filtration applications, and for general purpose fluid clarification.
Pall Melt Blown Flat Sheet Media Filtration Products are recommended for wet etch and clean applications to treat water, aqueous solutions, and low viscosity process fluids. The large surface area provides increased particulate absorption capacity. A graded depth structure makes efficient use of the filter structure by utilizing the entire volume of medium for contaminant removal. Enhanced structure technology creates multiple filtration zones while increasing or decreasing internal voids.
All Pall filters are ideal for low particulate shedding as the bonded and/or highly entangled fibers reduce downstream shedding. The pleated depth media combines the advantages of both large surface area with graded depth for compatibility for pleating. Pall’s products are 100% integrity tested for improved consistency and reliability. Pall uses proprietary production techniques and microprocessor controlled manufacturing equipment to provide reliable filters.
- Recirculating baths
- Plasma Etchers
- Single pass systems
- High velocity jet spray systems
- Quick dump rinse systems
- Mechanical scrubbing systems
- Enhanced process stability
- Designed for high flow applications
- Increased area/process efficiency
- Extended chemical life
- Reduction in PCB surface defects
Pall Wet Etch clean filters eradicate defect causing contaminants from crucial cleaning systems. Contact a Pall expert to learn how you can better control your process conditions to improve operating efficiency and lower PCB surface related defects.
Contact our team of filtration experts for more information on improving the efficiency of your process.
We help scale operations, large and small, reduce the costs, increase reliability and maintain unmatched levels of efficiency.
Let’s find the right solution, together.
Let’s connect. We want to share our innovative filtration solutions with you today. Contact our knowledgeable subject matter experts for information on how we can help. Thank you and we look forward to assisting you shortly.