PCB Assembly and Production

At Sierra Assembly Technology Inc., we ensure circuit board assembly that is efficiently produced and quality tested upon completion. We offer lead-free/RoHS compliant production capabilities, thorough knowledge of surface mount technology, and extensive through-hole assembly experience. Our team also places an emphasis on quick turnarounds, so our customers are never left waiting for us to deliver.

PCB Production

  • Complex RoHS and non-RoHS PCB construction for all industrial sizes
  • PTH, SMT and mixed technology circuit assembly
  • Top and bottom placement
  • Single and double-sided assembly
  • No-clean flux process and closed loop aqueous cleaning system
  • Conformal coating and bonding compliant with IPC-CC-830B
  • Cable and harness assembly
  • Complete mechanical and box build assembly
  • Fixture and fixtureless ICT and functional testing
  • PCB Repair and rework (ball grid array and quad flat pattern included)

Supply Chain Management for On-Time Delivery

  • Component sourcing
  • BOM analysis and suggestions for cost, availability, and serviceability improvement
  • Cost optimization demand aggregation
  • Approved Vendor List management
  • Supplier certification and management
  • Demand forecast and supplies management
  • RoHS and non-RoHS inventory management

Quality Management and Assurance

  • procedures and documentation on line
  • Work instructions and documentation in hard copy
  • ESD, moisture sensitive, first in/first out procedures
  • Statistical process control points
  • Non-conforming material identification, segregation and disposition maintenance report
  • Reporting and tracking performance metrics
  • Ionograph contamination testing


  • µBGA and BGA repair
  • Board level troubleshooting
  • Component level repair
  • PCB Inspections (Functional, ICT, and X-ray)

Quick Contact


I approached Sierra after being referred to them from another PCB designer. What impressed me was that they were more than willing to take a complex PCB requirement. The PCB assembly they provided was small, lightweight, but provided the amount of power needed for our computer product. Great experience.

- Susan R – Business Computer Industry

I liked Sierra’s quick turn PCB assembly services. They provided a prototype within a few days, and it worked without a hitch. I was extremely satisfied with the quality of the PCB. Their prices are great too.

- Jason G. – Telecom Industry

Sierra Assembly Technology has a great group of people to work with. They are open to almost any request and always get the job done quickly. I’ve been in some tight spots before and needed certain products within a small time window, and Sierra has always been reliable.”

- Richard S. – LED Lighting Manufacturer

Your Partner in Southern California for Circuit Board Assembly Services GET A QUOTE

Sierra Assembly Technology Inc.

10880 Mulberry Ave

Fontana, CA 92337

Phone: 909.355.5400

Email: sales@sierraassembly.com