Uniflex Circuits

Quick-turn flex circuits, Quality Fabrication
(408) 998-5500  

Capabilities – Flex Circuit Design, Fabrication & Assembly

Uniflex understands that customers are often looking for a one stop shop to handle their flex circuit design, fabrication, as well as assembly needs to reduce product handling and lead time associated with out-sourcing each of these tasks. Whether your idea is a sketch or diagram, we’ll help you design a cost-effective interconnect solution. Uniflex is also set up to handle component assembly including connectors and various surface mount components. Presented are common capabilites. Come speak to us concerning tighter tolerances or special process requirements.


Material Selection


Polyimide Films 0.5 mil (.0005″), 1 mil (.001″), 2 mils (.002″), 3 mils (.003″), 5 mils (.005″)
Thermobond Adhesives Acrylic/Modified Acrylic, Phenolic Butyral, Modified Epoxy
Copper Foils (rolled-annealed) 1/4 oz , 1/3 oz,  1/2 oz. (.0007″), 1 oz. (.0014″), 2 oz. (.0028″)
Stiffeners FR-4, polyimide, metal, or customer supplied
FR-4 in Multi-layer Flex Circuits Laminated to flex circuit to create rigid flex boards.  Typically with vias.
Surface Finish Solder (hot air leveling or electrolytic plating), Electroless Au and Ni, Silver, Tin plating
Other Materials or Finishes Speak with us concerning your special requirements

Artwork Capabilities and Tolerances


Minimum Trace and Space .002″/.002″ (1/4 oz.) .003″/.003″ (1/2 oz.)
Minimum Annular Ring Over Drill Size .014″
Required on Artwork to Maintain Tangency .010″ (GERBER required)
Minimum Inner Diameter or Thermal Reliefs .006″ (drill size)
Minimum Space Between Coverlay Openings .010″
Edge of Coverlay Opening to Trace .007″ (preferred)
Minimum Legend Line Width .007″

Drill Capabilities


Smallest Drill Size .006″ mechanical .002″ laser
Largest Drill Size .267″
Smallest Slot Width .008″

Fabrication Tolerances


Minimum Trace to Route Edge Dimension +/- .005″
Minimum Route Dimensional Tolerance +/- .005″
Minimum Tolerance of ZIF Connector to Edge of Flex +/- .002″
Minimum Feature to Feature Dimensional Tolerance +/- .002″
Minimum Corner Route Radius .010″ +/- .0005″
Minimum Inside Radius .006″ +/- .0003″



Minimum Layer to Layer Registration +/- .005″
Drill Position Accuracy +/- .003″
Average Copper Plating Tolerance (PTH only) .001″ +/- .0005″
Average Solder Plating Thickness .0003″
Squeeze out of 1 mil Adhesive and 2 mil Adhesive .003″ +/- .001″ .006″ +/- .003″