FLEX PCB Manufacturer


Blind Buried Circuits offers a wide range of Flexible printed circuit boards or FPCBS manufacturing and Flex PCB assembly in USA, with various flex PCB material types and coverlay options. Flex PCBs are similar to rigid flex PCBs, but when it comes to the difference between flexible PCB vs rigid PCBs, Flex PCBs are getting popular due to their flex PCB design pattern and ease of fitting in any device where Rigid PCBs cannot be used.

While many designers get worried while designing about the manufacturing capabilities of their suppliers, we encourage our customers to contact us when designing the flex circuit and considering flexible PCB material properties so our experienced engineering team can guide them over their design parameters to achieve maximum efficiency.

Rigid PCBs
Our PCB Capabilities


Flex PCBs are electronic circuits designed to make them flexible, bendable, and capable of fitting into tight spaces. But to maintain the tight spaces, the flex PCB design requires flexible PCB material suppliers, flexible PCB stackup, tight tolerances and special process treatments.


Blind Buried Circuits flexible PCB fabrication manufacturing capabilities include the following:

Flexible PCB Material Selection
polyimide flexible PCB Subtract (Thickness) 12 µm (0.0005”), 15 µm (0.005”), 25 µm (0.001”), 50 µm (0.002”), 75 µm (0.003”)
Copper Clad (Thickness) 9 µm (0.25 oz), 12 µm (0.33 oz), 17 µm (0.5 oz), 35 µm (1 oz), 70 µm (2 oz)
Copper Foils (Rolled-Annealed) Polyester, Polyimide, PIC (Photo Imageable Cover Coat), LPI (Liquid Photo Imageable)
Stiffeners or flexible PCB insulation Polyimide, Metal, FR-4, or customer supplied
Thermo-Bond Adhesives Phenolic Butyral, Acrylic, Modified Epoxy
Surface Finishes Immersion Tin, Entek 106A, ENIG (Electroless Nickel Immersion Gold), Hard Gold, Electrolytic Soft Bondable Gold, Tin/Lead Plating, and Hot Air Solder Leveling
Process Tolerances and Capabilities
Minimum Trace/Space 0.0015”/0.002” for 0.33 oz copper 0.002”/0.0025” for 0.5 oz copper 0.003”/0.0035” for 1 oz copper
Minimum Via Hole Dia (Before Plating) 0.006” (NC Drill) 0.002” (UV Laser)
Minimum Blind Via Dia (Before Plating) 0.004” (UV Laser)
Trace to Edge Distance 0.010” for NC Routing 0.008” for Die Punch method 0.001” for UV Laser
Trace to Edge Tolerance 0.005” for NC Routing 0.003” for Die Punch method 0.001” for UV Laser
Cover Layer Aperture Positional Tolerance 0.005” for Cover Film 0.002” for LPI and PIC 0.001” for Laser Ablation


All types of printed circuit boards consist of various benefits and flexible PCB application, whether making a wearable product or a phone; all types of PCBs play a significant role in product development. But when it comes to traditional Rigid PCBs, they are used for the very specific area where bendability doesn’t matter at all. But regarding wearable products like smartwatches, Rigid PCBs are useless. That’s when Flex PCB helps in completing the idea into the product. The following are the significant benefits of PCB Flexible or FPCBs:

  • Reduced flexible PCB board thickness and weight: When it comes to ideal application, the designers always focus on low weight and thickness, attracting consumers to carry it easily. This is where Flexible PCBs play a vital role; the flexible PCB thickness is much thinner and lighter in weight than Rigid PCBs. The most common example of flex circuits is flexible PCB connectors.
  • Improved flexibility: With the products like flexible smartphones and wearable electronic items, the circuit needs to be in a specific shape to maintain the product’s form factor. Flex PCB board can be bent and flexed in any direction by considering and calculating the flex factor. Contact us if you have any questions regarding the flex factors for your PCB design or flexible PCB design guidelines.

We cater several Flexible Circuit Board markets

Consumer Electronics

We help companies that manufacture products like smartphones, tablets, and wearable devices, very common products that consist of Flexible PCBs. These are widely used in consumer electronics due to their small form factor and flexibility.

Medical Devices

We have contributed in several top notched medical products, which include diagnostic equipment, implantable devices, and monitoring systems. The flex PCB board are manufactured under controlled temperatures and with IPC Class 3 quality standards.

Aerospace and Defense

Our flexible PCBs are used in various aerospace and defense system applications such as missiles, aircraft, and satellites.

Automotive Industry

With the revolution of electronic vehicles all over the globe, we have served various automotive applications such as safety systems, entertainment systems, and navigation systems.

Industrial Applications

Our flexible PCBs are implanted in industrial applications such as robotics, control systems, and sensors.

Don’t hesitate to get in touch with our sales team at [email protected] if you have any questions or concerns regarding flexible PCB prototype and production.

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