Our company to provide you with a professional phone keyboard carbon pcb, long life, high quality. We not only produce suitable carbon board for the telephone, but also the keyboard type carbon board we can provide for you. And we also provide pcb assembly service.Handle PCBMain technical parameter:Rang of total resistance:1 KΩ -1 MΩResistance tolerance:±20%Resistance to heat:260℃ ±5℃, 5sec. △TR≤±50%Durability:1 Million cycles MinAutomobile componentMain technical parameter:3 KΩ -1 MΩResistance taper:LinearResistance tolerance:±20%Linearity tolerance:±1%Durability:1 Million cycles MinTCR:With ±1000 PPM (-30℃ — +70℃)Electric drill componentMain technical parameter:3 KΩ -3 MΩResistance tolerance:±20%Linearity tolerance:±1%Durability:1 Million cycles MinOur services One-stop  OEM ODM  PCB/PCBA manufacturer We are professional manufacturer in  various Ceramic PCB/PCBA and Carbon PCB/PCBA with 9 years experience, we can provide a reasonable price with high quality products.SMT CapacitySMT ItemCapacityPCB Max. size510mm*1200mm(SMT)Chip component1206 0805 0603 0402 0201 packageMin.pin space of IC0.1mmMin. space of BGA0.1mmMax.precision of IC assembly±0.01MMAssembly capacity≥8 million piots/dayDIP capacity6 DIP production linesAssembly testingBridge test,AOI test, X-Ray test, ICT(In Circuit Test),FCT (Functional Circuit Test)FCT(Functional Circuit Test)Current test, voltage test, high temperature and low temperature test, Drop Impact Test,aging test, water proof test,leakage-proof test and etc. Different test can be done according to your requirement.Packaging&Shipping