Poly-Flex Circuits provides high quality, low cost solutions for your telecommunications needs. Flexible circuits for the telecommunications market include:

• Business telephone circuit
• Consumer telephone circuit
• Cellular telephone circuit
• Poly-dome
• Wireless local loop antenna

Sample Applications

Business telephone membrane/flexible circuit:

Business telephone circuit

Double-sided multi-layer flexible circuit on a single substrate eliminates the need for a multi-layer rigid board SMT components assembled to the circuit including LED's, transistors, and resistors 40 inter-digitated switches on the top layer of the circuit Interconnect accomplished by bending the tail area back 180 degrees to connect to the telephone control board at the base of the telephone (this eliminates a flat flex cable and connector assembly on the end product)

Consumer answering machine membrane / flexible circuit:

Multi-layer, single-sided circuit - PTF membrane switch construction LCD assembled to the circuit using anisotropic conductive adhesive, eliminating tape interconnect LCD mounted on a flap and oriented in a three-dimensional plane from the remainder of the flexible circuit in the end product LCD driver (SOIC) assembled onto the flexible circuit EMI / RFI shield in the display driver and circuit area

Consumer telephone circuit

Cellular telephone keypad array:
cellular phone circuit	PTF circuit layer with inter-digitated switches mounted on a plastic and a metal backer for ease of installation and support in the cellular telephone assembly Circuit layer includes six 0603 LED's that backlight the silicon rubber keypad Poly-Dome array laminated to the switch / backlighting circuit layer

Features of tactile poly-dome arrays from Poly-Flex:

Environmental stability - 85° C / 85% RH for 120 hours Meet accelerated life test requirement of 100° C for 120 hours Temperature shock survivability from -40° C to 85° C, 32 cycle @30 minute interval dwells >1,000,000 cycle life of the dome Available separately from the switch layer in reel or fanfold format for automated assembly to the RF board of a cellular phone Metal dome arrays are also available

cellular telephone polyester dome sheet

Wireless local loop
Wireless local loop	Polymer Thick Film silver filled ink serves as plating initiator surface for low impedance antenna Flexible ink allows forming from flat to curved surface without cracking Ink system has high abrasion resistance enabling mechanical attachment of interconnect terminals