Hasl 8 Layer PCB Surface Finish GPS Module Blue Solder Mask ENIG

8 Layer PCB Used In GPS Module Blue Solder Mask ENIG

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FAQ:

Q1:What is PCB Grid Testing or Bed of Nails Testing?

A1: Grid testing or Bed of Nails testing is a process used to check the performance of components mounted on a PCB board. This test uses a frame/fixture that contains various pins inserted into an epoxy phenolic glass cloth laminated sheet (G-10) in order to access all the PCB test points. These pins act as sensors which are aligned to make contact with the test points on the PCB board and are also connected with a measuring unit through wires. The position of the pins is designed and customized for each PCB based on the components or points on the board that need to be tested.

A grid testing machine has three building blocks - a fixture, a bed of nails and software, to control the overall functionality of the machine. It usually has two cameras which are placed on the top and bottom of the machine in order to scan the whole board.

Advantages of PCB Grid Testing:

• Very Reliable method of PCB testing as all the points on the PCB board can be tested simultaneously.
• Offers very good accuracy since it uses two cameras
• Can easily detect manufacturing defects
• An in-circuit tester is easy to program
• Interpretation of test results is quite easy
• It checks for Open, shorts, mission components, Wrong polarity, defective components, and current leakages in the circuit
• Most of the parameters can be checked without applying power to the PCB under test