Double Sided PCBs

Double Sided PCBs

As the name suggests, a double sided printed circuit board (PCB) consists of two circuit copper layers, one on each side. These PCBs are also sometimes referred to as Double Sided Plated Thru, or DSPT circuit boards. You will find a number of manufacturers, who claim to provide high-quality services and products related to these circuit boards. However, very few among them will actually go one providing good quality products and services. Among these few, there is one name – Sierra Assembly. We are one of the leading, and most trusted double sided PCB manufacturers in the US.

Double Sided PCB Capabilities

At Sierra Assembly, the following are our capabilities, when it comes to designing double sided circuit boards:
Layer Count / Technology  2 Layer PTH
ID Print White
Minimum Drilling Diameter 0.2 mm
PCB Thickness Range 0.4 mm – 3.2 mm
Contour Production Milling
Scoring Yes
Materials FR4
FR4 Halogen reduced
Surfaces Immersion Ni/Au
Plated Ni/Au
Immersion Tin
HAL Lead-free
Electroplated Ni/Au
Glass Transition Temperature 105°C
Aspect Ratio 1:8
Smallest Routing Bit 0.8 mm
Copper Thickness 18 µm
35 µm
70 µm
105 µm
140 µm
Min. Line / Spacing 100 µm
Copper Plating Holes 20 µm
Conductor Track Widths ≧ 90 µm
Max. PCB Size 580 mm x 500 mm
Soldermask Registration +/- 100 µm ( Photoimageable )
Soldermask Color Green
Min. Soldermask Dam 100 µm
Smallest Drill 0.28 mm
Min. Annular Ring 150 µm
Production Panel 609.6 mm x 530 mm
609.6 mm x 457.2 mm

Beneficial Features of Double Sided PCBs

There are several reasons why double sided printed circuit boards have become so popular in a vast variety of applications. The following beneficial features of these PCBs are the reasons for their popularity:
  1. Compared to the other types of printed circuit boards, the double sided PCBs are available at lower costs. This is one of the major benefits.
  2. Size of the circuit board is reduced significantly. This further helps in reducing the designing and manufacturing costs.
  3. These circuit boards are known to offer increased flexibility for designers.
  4. The double sided circuit boards have an intermediate level of circuit complexity.
  5. The overall circuit density is increased by using these PCBs.

Applications of double Sided PCBs

The beneficial features explained above make these circuit boards ideal for use in a variety of applications, such as:
  • Rear Lights LED
  • Switches
  • Airbag
  • ABS
  • Air-Condition
  • Sensors
  • Automotive
  • UPS systems
  • Hard drives
  • Vending machines
  • Line reactors
  • HVAC
  • Power Supplies
Do you have any requirements related to double sided printed circuit boards? Are you looking for a company to design and manufacture double sided PCBs at reasonable prices? You have come to the right place. Sierra Assembly is one of the most experienced manufacturers of these circuit boards. We have the capability to design and manufacture boards that match your exact specifications. And this is not limited to the double sided circuit boards, but you can avail various types of PCBs from us. Get a quote for your requirements from us today. For any further information, you can reach out to us via phone on 909.355.5400 or send us an email at .

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