PR Hoffman's exacting standards for material selections and manufacturing methods have earned us choice status as a preferred vendor to the semiconductor industry.

The company manufactures waxless mount assemblies for single-side polishing of silicon wafers of all diameters.

We use a buffed porous mounting material that, when wet, produces the necessary adhesion to hold the wafer in place. To ensure that the wafer stays in place, we add an FR-4 template. The buffed mounting material allows the wafer to rotate in the pocket.

PR Hoffman templates are made flat to stay flat. The buffed poromeric material is backed by a non-absorbent, non-compressible fabric. The pad stays resilient evenly across the full width of the recess, producing measurably flatter wafers.

Each template is backed with a pressure-sensitive adhesive, specifically suited to withstand the effects of the polishing process. Our templates are assembled in a clean, climate-controlled environment to limit particle contamination. All template edges are milled smooth to prevent shredding during the polishing process. The final product is sealed in one-load packages to keep templates clean and uncontaminated until use.

STANDARD FEATURES

• Flat - The buffed poromeric is backed by a non-absorbent, incompressible fabric. The pad stays resilient evenly across the full width of the recess, run after run, producing measurably flatter wafers.
  
  
• Long-Lasting - Adhesives specifically selected for this application withstand the effects of the polishing process.
  
  
• Clean - Templates are assembled in a clean, climate-controlled environment to limit particle contamination.
  
  
• Prevent Scratches - All edges of the FR-4 template are milled smooth to prevent shedding of glass fibers during polishing.
  
  
• Load Size Packaging - Templates are sealed in durable plastic sleeves. Each package contains only enough templates for one machine load to keep them free of contamination until use.
  
  
• Easy Installation - The template assembly is backed with a pressure-sensitive adhesive. Just peel away the release paper and press the assembly onto the carrier.
  
  
• Common sizes - Template sizes for common silicon polishers are available to hold standard wafer diameters.
  

Technical Data Sheet - Template Material and application information.

        Literature: Templates.pdf (~175kb) Template Brochure

 
  1517 Commerce Ave., Carlisle, PA   17015
  Phone: +1 (717) 243-9900      Fax: +1 (717) 243-4542
  Email:  prhoff@prhoffman.com