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Specifications are general and may vary depending upon circuit construction, conductive medium, component requirements and unique customer applications. Please refer any additional specifications or requirements to your Douglas sales representative for complete and timely response to your questions. Our sales department and engineering staff are always available for your convenience.
ISO 14001:2004 and ISO/TS 16949:2002 Certified
Polyester Flexible circuits
With over 75 years of product graphic design experience including screen print manufacturing of membrane switches, it was a natural progression for Douglas to enter the Polyester Flexible Circuit market. The processes are parallel to the degree that we can apply our expertise to the production of high-tech, precision engineered flex circuits.
Douglas can produce a wide variety of flex configurations to meet different applications. Using polyester as our base material, we have produced circuitry for applications as diverse as an office, a chemically corrosive test unit and many harsh exterior environments.
Design Guidelines:
- Base Material: Typically .005 or .007 heat stabilized polyester.
- Conductive Inks: Silver, carbon and silver-carbon blends and copper flex.
- Dielectrics: Standard screen printed electronic insulating materials.
- Circuit: Typically .010 wide (min.) lines and spaces / .002 typ. ht.
- Multi-layer Circuitry: Three layers (max.) to maintain circuit integrity with shielding capabilities.
- Resistance: Typical circuit loop or output resistances will be less than 100 ohms and are dependent upon specific circuit designs.
- Attached Component Resistance: Typical conductive adhesive resistances are 25 to 35 milliohms.
- Performance Characteristics: All ASTM standards for membrane switches and flex circuits are met or exceeded.
- SMD Components Installation: Most SMD components are available and are accurately and securely installed using state-of-the-art SMD technology.
For additional mechanical, electrical and environmental capabilities, contact your Douglas sales representative or your Douglas engineering specialist.
Advantages Over Etched Copper Circuits
- Lower costs
- Cost effective with low volume
- Fewer environmental issues
Specifications:
- Operating Voltage: 0 - 30 VDC.
- Operating Current: 100 MA max.
- Operating Loop Resistance: Less than 100 OHMS typical when measured at the connector.
- Conductors: Silver, carbon or carbon blend.
- EMI, RFI and Static Shielding: Available in most applications.
- Storage Temperature: -40ºC (-40ºF) to +85ºC (1581 4F).
- Storage Altitude: Sea Level to 40,000 ft.
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