Manufacturing technology of double-faced flexibility printed board

摘要: The invention discloses a manufacturing technology of double-faced flexibility printed board. comprises the following steps that firstly, material appropriate type and specification is selected; secondly, during drilling, plurality copper-clad plates are overlapped; thirdly, drilling dirt removed through acidic potassium permanganate; fourthly, hole wall immersed coated with fine graphite or carbon black coating to form conductive layer; fifthly, redundant residual liquid in on surface washed away water, drying carried out; sixthly, PCB etched hydrochloric acid solution including an oxidizing agent so layer can slightly swell, micro-hole channel be formed; seventhly, multi-layer board pressed dried. According technology, process simple convenient, cost low, environmental friendliness achieved.