Manufacturing of double-sided printed circuit board, Physics

Double sided printed circuit boards are used where a complex circuit with more number of ICs is to be accommodated. For preparing double sided PCB, base material has copper-clad on both the sides. The connection from one side of the board are taken to the other side using a plated through holes. Thus, the difference in processing a double sided PCB is processing of plated through hole. Initially base material is selected as copper clad and pre drilling is necessary. The copper clad is coated with photo resist. The positive of the artwork is kept pressed with copper clad and exposed to ultra violet light. This process protects part of the board from being plated. This process is known as masking. The exposed unwanted part of the artwork forms precipitate. Plating should be done through holes and around them on both sides of the boards. The exposed board is cleaned with various acids, and then dipped in SnCl2 activation solution. The unexposed part is activated. The board is tinned by electrolysis. The holes and track are tinned. Then the board is developed in developer to remove the precipitate on the unwanted part. Final finish is then gives to the board by cutting it in required shape.

Posted Date: 7/9/2012 3:49:08 AM | Location : United States

Related Discussions:- Manufacturing of double-sided printed circuit board, Assignment Help, Ask Question on Manufacturing of double-sided printed circuit board, Get Answer, Expert's Help, Manufacturing of double-sided printed circuit board Discussions

Write discussion on Manufacturing of double-sided printed circuit board
Your posts are moderated
Related Questions

Q. Explain about end rule? When glanced from one end if the current through the solenoid is along clockwise direction the nearer end corresponds to South Pole and the other end

A ballerina begins a tour jete with angular speed ?i and a rotational inertia consisting of two parts: Ileg = 1.55 kg*m^2 for her leg extended outward at angle ? = 90.0 to her body

a ball is thrown upward from the top of a building 60m hign with an initial velocity of 49.0 m/s. when is the ball 78.4 meters above its starting point?

What is the name of the first American physicist to win two Nobel prizes? Ans: (John) bardeen was the first American physicist who win two Nobel prizes.

Q. Illustrate what path does an asteroid take? Answer:- The asteroid will forever take the path minimizing its Lagrangian recognized as the least action principle in Lagra

What are the objectives to know about working of ultrasonics? Objectives of ultrasonics: a. Understand the term ultrasonics. b. Describe the principle, working and constr

A polyatomic (non-linear) molecule (like NH3) can rotate about any of three co-ordinate dimension. As it has 6 degrees of freedom, 3 rotational and 3 translational. At normal tempe

what is alternating current