Founded 2008 Employees 652 Location China Manufacturer's Products Filter,Duplexer,Rx Filter,Post PA Filter,Quadplexer,VCSEL,HBT Website http://www.chemsemi.com Product http://www.chemsemi.com/html/product/1.html Contact http://www.chemsemi.com/html/Contact/ Product Tags Filter Duplexer Rx Filter Post PA Filter Quadplexer VCSEL HBT