How Printed Circuit Boards Are Made

Printed circuit boards, or PCBs, are absolutely essential to the functioning of all electronic equipment from the simplest computer mouse to the vast computer arrays that power space programs. PCB manufacturing has come a long way since the very first such devices. Today’s pick and place machines, or SMT component placement systems, can precision place elements on a printed circuit board at high speed.

What is a Printed Circuit Board?

As its name suggests, this is simply a board made of an insulated material on which electrical circuits are laid in a particular order. The simplest printed circuit board has copper tracks that connect along only one layer and side of surface. The most complicated such boards can be printed on both sides or even in multiple layers of boards. The circuits on either side of the board or between the layers are connected through small holes punched in the insulated materials.

How Does PCB Assembly Work?

The first step to circuit board fabricatContinue reading

h3>Types of Membrane Switches
A membrane switch is a momentary on/off switch for many different circuits. Membrane switches are thought to be momentary because they operate normally open, push to close, and immediate opening conditions. What this means is that once the switch is pressed, the two poles within make contact to close the circuit. Membrane switches are used in many industries, ranging from medical and commercial applications to consumer markets. Membrane switches are made by printing silver or carbon ink onto polyester film and then an overlay is applied to the first surface as the graphics interface.

There are two types of membrane switches: tactile and non-tactile. A tactile membrane switch relies on the user’s touch to connect the switch and underlying control panel. When pressed, the user may feel a snap of the switch. Tactile switches are used for instruments, interface control-panel applications, and keypads.

A non-tactile membrane switch is intended Continue reading