pcb board to develop today has more than 100 years of history , it is the provider of electronic components electrical connections, its small footprint, it has been the lack of enterprise wide use .
One of the steps in the pcb circuit board production :
Corrode circuit boards, reflow soldering machine . First check whether the transfer complete circuit board , if the minority is no good place to transfer oil pen with black patches . Then you can corrode , and so when the copper film exposed circuit board completely eroded , the board removed from the etching solution to clean , such a circuit board on the corrosion better. The composition of the etching solution of concentrated hydrochloric acid, hydrogen peroxide, water, the proportion of 1:2:3 , in the preparation of the etching solution , the first drain, plus concentrated hydrochloric acid, hydrogen peroxide , if the operation of concentrated hydrochloric acid, hydrogen peroxide or an etching solution does not carefully splashed on skin or clothing should be promptly cleaned with water , due to the use of highly corrosive solution , we must pay attention to safety when operating!
Pcb board as the substrate to the insulating plate , cut to size, with which the at least one conductive pattern , and the cloth hole ( such as component hole , the fastening holes metallized holes, etc. ) , is used in place of a conventional electronic element device chassis of the device, and to achieve interconnection between electronic components . Since this electronic printing plate is produced , it is called " printed " circuit board. Habit called " PCB " to " Printed Circuit " is inaccurate , because the PCB did not "printed elements " while only wiring .
