Suppliers / San Francisco Circuits

PCB Fabrication & Assembly; RF, Military Grade, Flex, & Metal Core PCB Capabilities for Unmanned Systems

United States of America
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San Francisco Circuits

PCB Fabrication & Assembly; RF, Military Grade, Flex, & Metal Core PCB Capabilities for Unmanned Systems

1660 S Amphlett Blvd #200 San Mateo, CA 94402 USA United States of America Regional Offices
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Flex & Rigid Flex PCBsSan Francisco Circuits is an industry leader in all aspects of PCB fabrication and assembly.  We work with a strong network of PCB manufacturers and PCB assembly houses, both domestic and offshore to provide a one-stop solution and the best value possible for all printed circuit board requirements.

San Francisco Circuits provides both prototype PCBs and large PCB production volumes for every application of unmanned systems utilizing both basic and advanced technologies.

Our team of experienced technical experts strive to provide a quick turnaround, not just on printed circuit boards, but also customer service.

PCB Fabrication & Manufacturing Capabilities

Printed Circuit Boards for Drones, UAVs, UGVs and Robotics

Specifications Standard Technology Advanced Technology
Number of Layers 1 – 12 14 – 40
PCB Board Material Rigid PCB Materials
FR4
FR406
370HR
VT-47
FR408
Arlon
CEM
Megtron 6
Astra MT77
Tachyon 100G
Nelco 4000
Rogers 3000 Series
Rogers 4000 Series
Rogers 5000 Series
Rogers 6000 Series
Taconic TLY
Polyimide		 MCPCB, Aluminum Core & Copper Core Materials
Aluminum Core
Copper Core
Ventec VT-4A1/VT-4A2
Aismalibar Fastherm
Aismalibar Flextherm		 Flex PCB Materials
Kapton
Shin-Etsu – Epoxy
Adhesive System
Rogers – Epoxy
Adhesive System
Dupont FR – FR Acrylic
Adhesive System
Dupont LF – LF Acrylic
Adhesive System
Adhesiveless Base Materials		 Aluminum Core
Ventec VT-4A1/VT-4A2
Aismalibar Fastherm
Aismalibar Flextherm
Copper Core
Nelco 4000
Rogers 3000
Rogers 4000
Rogers 5000
Rogers 6000 Series
Taconic TLY
Polyimide
Min. Circuit Board Thickness 2 layer – 0.010″
4 layer – 0.020″
6 layer – 0.020″
8 layer – 0.062″
10 layer – 0.062″
12 layer – 0.062″		 2 layer – 0.005″
4 layer – 0.010″
6 layer – 0.031″
8 layer – 0.040″
Max. Circuit Board Thickness 2 layer – 0.125″
3-12 layer – 0.200″		 0.250″ – 0.500″
Max. Circuit Board Size 16″ x 22″
12″ x 21″		 10″ x 16″
16″ x 22″
12″ x 21″
Copper Thickness 0.5 oz – 3 oz 4 oz – 10 oz
Hole Aspect Ratio 7 : 1 15 : 1
Min. Hole Size 0.008″ 0.004″
Min. Trace/Space 0.006″/0.006″ 0.002″/0.002″
Min. Drill-to-Copper 0.010″ 0.005″
Min. Pitch 1 mm 0.3 mm
PCB Board Finish HASL (Solder)
Lead Free Solder
Copper
Gold
Gold Fingers
White Tin
ENEPIG
ENIG		 HASL
Gold (ENIG/Hard/Soft)
Selective Gold
Immersion Silver
OSP
White Tin
ENEPIG

More: PCB Fabrication Capabilities

PCB Assembly

PCB AssemblyWe offer a one-stop service for all your printed circuit board assembly needs, taking care of the hard work of component procurement and liaising with vendors. PCB assembly services offered include quick-turn prototype, turnkey, partial turnkey, consignment and lead-free assembly. Our average lead times are 1 to 5 days for assembly with or without turnkey (component procurement).

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PCB Technology

Military Grade PCBs (Mil Spec)

milspec pcbs - military grade printed circuit boardsCertified mil-grade PCBs are one of SFC’s specialties. With PCB manufacturing capabilities in the United States, we can fabricate high-quality reliable MilSpec certified flexible or rigid circuits. SFC manufacturers work to certification standards such as MIL-PRF-55110, MIL-PRF-50884 and MIL-PRF-31032 with a range of finishes, solder masks, silk screens and fabrication methods.

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Flex PCBs

Flex PCBs - Flexible Circuit Board manufacturingFlex PCBs use the same components as rigid PCBs but are fabricated on a flexible base material, allowing the board to conform to a wider range of desired shapes. The size and weight reduction and increased resistance to noise and vibration make flex circuits highly useful in a wide variety of applications, including Transport, Communications, Aerospace and Unmanned Vehicle Systems.

We can provide heavy copper Flex PCBs and double-sided multilayer Flex PCBs. Turnaround for your design can be as fast as 24 hours.

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Metal Core PCBs

metal core pcb manufacturing

Metal core PCBs use a base metal such as aluminum, copper or a special alloy to dissipate heat away from sensitive components and other critical parts of the design. This allows heat transfer that is 8 or 9 times faster than in traditional FR4 boards. Metal core PCBs are ideal for applications such as LED lighting, power converters and motor control. We can provide aluminum or heavy copper core PCBs for prototypes or production quantities.

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HDI PCB

HDI PCB technology is one of the fastest growing areas of the PCB market. HDI circuits provide much higher wiring densities than standard PCBs, and incorporate features such as blind/buried vias, vias-in-pad and micrometre-level circuit geometries. HDI technology can reduce the size and weight of your boards while enhancing signal transmission and reducing signal loss. We can provide a variety of board construction methods and materials, including flexible HDI PCBs.

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RF PCB Manufacturing

Radio Frequency printed circuit boards (RF PCBs)Radio Frequency printed circuit boards (RF PCBs) are high frequency PCBs that operate above 100MHz; anything above 2GHz is classed as a Microwave PCB. Our designers can assist with everything from saving costs on simple radio frequency circuit boards, to manufacturing advice for demanding fifty-layer layouts and concepts. Our RF PCB capabilities include manufacturing and assembly for both prototypes and production quantities.

More: RF/Microwave PCB

PCB School

SFC has developed a unique offering for engineers and PCB buyers. The PCB School is a free online resource created to help educate users on various technologies, equipment, and buying resources relating to printed circuit boards.

Find out more: SFC’s PCB School

Products

Rigid Flex PCB

Rigid flex printed circuit board manufacturing

PCB Prototyping

Prototype PCB fabrication & assembly with as low as 24-hour turnaround

Radio Frequency PCBs

RF PCBs – Radio frequency circuit board manufacturing

Metal Core PCBs

Metal Core PCB manufacturing

Flex PCBs

Flexible Circuit Board manufacturing

Military Grade PCBs

Certified MilSpec printed circuit board manufacturing

Documents
Component Sourcing & Overages
ISO 9001 Certificate
ITAR Registration Certificate

Articles

Latest
What is Immersion Silver Surface Finish?

San Francisco Circuits examines what Immersion Silver is, its key benefits and applications on fine-pitch components, and how to choose a qualified boardhouse to maintain quality

Dec 31, 2024
Next-Generation PCB Surface Finish Explained

ENEPIG elevates circuit board performance, a cutting-edge surface finish that transforms reliability, solderability, and durability in complex electronic applications

Dec 12, 2024
Technology Spotlight: ENIG PCB Surface Finish

San Francisco Circuits’ Electroless Nickel Immersion Gold PCB surface finish is resistant to corrosion and provides a flat surface, ideal for assembling intricate and high-density PCBs

Nov 13, 2024
High-speed Circuit Design For Modern Circuitry

San Francisco Circuits’ article on High-Speed Circuit Design for Modern Circuitry focuses on signal integrity across various frequencies, highlighting best practice for different speed ranges

Sep 16, 2024
Optimizing Printed Circuit Board Performance with Gold Surface Finishes

San Francisco Circuits explains how gold printed circuit board (PCB) surface finishes improve conductivity, solderability, and longevity, detailing the benefits of hard and soft gold finishes for optimal performance

Aug 13, 2024
PCB Line Spacing: A Breakdown for High Voltage Applications

San Francisco Circuits has released an article outlining how PCB Line Spacing is critical for both safety and function in high voltage circuitry, as well as the specific spacing standards required

Jul 10, 2024
Via Tenting in PCB Design & Assembly

San Francisco Circuits takes an in-depth look at Via Tenting, the process of using a soldermask layer to cover the via holes on a Printed Circuit Board (PCB)

Feb 27, 2024
PCB Assembly Drawings: Polarities, Pin1 & Anode/Cathode Markings

San Francisco Circuits has created a new resource on PCB assembly drawings covering polarities, Pin1 marking and anode/cathode markings. In...

Jan 05, 2024
Advanced PCB Reflow Soldering Capabilities Announced

San Francisco Circuits has announced the launch of advanced printed circuit board reflow soldering capabilities, a technique which allows the assembly of complex PCBs with a high component density

Aug 01, 2023
How to Avoid Insertion Loss When Designing New PCBs

San Francisco Circuits has created a new resource to assist PCB designers with the best practices surrounding PCB Insertion loss....

Jul 05, 2023
San Francisco Circuits Releases PCB Stack-Up Guide

San Francisco Circuits has put together a PCB Stack-Up Guide. A PCB stack-up is a high-level outline created before laying...

Feb 13, 2023
Reference Guide for PCB Materials

San Francisco Circuits (SFC), a provider of electronic PCB (printed circuit board) fabrication, assembly and test services for unmanned systems...

Sep 21, 2022
San Francisco Circuits’ PCB Component Shortage Report 
Jun 23, 2022
Checklist for Seamless PCB Manufacturing

San Francisco Circuits (SFC), a provider of PCB (printed circuit board) fabrication, assembly and test services for unmanned systems and...

Oct 26, 2021
Thermal and Dimensional Stability in PCB Design

San Francisco Circuits (SFC), a provider of PCB (printed circuit board) fabrication, assembly and test services for unmanned systems and...

May 25, 2021
Routing Methods for PCB Design

San Francisco Circuits (SFC), a provider of PCB (printed circuit board) fabrication, assembly and test services for unmanned systems and...

Oct 15, 2020
Article: New Technology Developments in Microelectronics

San Francisco Circuits (SFC), a provider of PCB (printed circuit board) fabrication, assembly and test services for unmanned systems and...

Sep 10, 2020
The Importance of Trace Specifications in PCB Design

San Francisco Circuits has released an article highlighting different characteristics of PCB trace widths and layouts, and how and when...

Aug 08, 2020
San Francisco Circuits Achieves Controlled Unclassified Information Compliance

San Francisco Circuits (SFC), a provider of PCB (printed circuit board) fabrication, assembly and test services for unmanned systems and...

Jul 09, 2020
San Francisco Circuits Remains Operational During Pandemic

San Francisco Circuits (SFC), a provider of PCB (printed circuit board) fabrication, assembly and test services for unmanned systems and...

Apr 22, 2020
Compact Interfaces for SWaP-Constrained PCB Designs

San Francisco Circuits has released an article explaining the use of pogo pin-based interfaces to save space on SWaP (size,...

Apr 02, 2020
Article: PCB Surface Finishes for High-Level Applications

San Francisco Circuits (SFC), a provider of PCB (printed circuit board) fabrication, assembly and test services for unmanned systems and...

Feb 13, 2020
San Francisco Circuits Offers Expanded PCB Tolerances

San Francisco Circuits (SFC), a provider of PCB fabrication, assembly and test services for unmanned systems and robotic platforms, has...

Aug 26, 2019
San Francisco Circuits Expands PCB Testing & Inspection Capabilities

San Francisco Circuits (SFC), a provider of PCB fabrication, assembly and test services for unmanned systems and robotic platforms, has...

May 16, 2019
San Francisco Circuits Updates Turnkey PCB Assembly Capabilities

San Francisco Circuits (SFC), a provider of PCB fabrication and assembly services for unmanned systems and robotic platforms, has announced...

Feb 21, 2019
SFC Introduces PCB Component Overages and Sourcing Worksheet

San Francisco Circuits (SFC) has announced the introduction of a new educational component of its website to address Printed Circuit...

Jan 07, 2019
Article: Guidelines for Bluetooth Circuit Board Design

Printed circuit boards with Bluetooth technology can be problematic with interference, lost data and poor signal integrity if certain precautions...

Nov 07, 2018
San Francisco Circuits Introduces Fine-Pitch PCB Assembly Capabilities

San Francisco Circuits has announced the addition of new fine-pitch printed circuit board (PCB) assembly capabilities, specially designed for high density...

May 10, 2018
San Francisco Circuits Develops RF PCB Capabilities for Unmanned Vehicles

San Francisco Circuits has announced new RF (Radio Frequency) PCB manufacturing and assembly capabilities for unmanned vehicle markets, having made...

Jul 03, 2017
San Francisco Circuits Chosen as “World’s Greatest” PCB Supplier

San Francisco Circuits, a provider of printed circuit board (PCB) fabrication and assembly solutions for unmanned systems and robotics, has...

Nov 10, 2016
Regional Offices & Locations
San Francisco Circuits, Inc. United States of America 1660 S Amphlett Blvd #200 San Mateo, CA 94402 USA +1.800.SFC.5143 Contact Office Contact Website
San Francisco Circuits, Inc. United States of America 3914 Murphy Canyon Rd., Suite A244, San Diego, CA 92123 USA +1.858.576.7202 Contact Office Website