2018

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Works Closed

23rd July-3rd Aug

P&M Services (R) Ltd

Printed circuit board Manufacturer, Photoplotting Established 1964  All types of Pcb, surface mount sm, PTH, SS single     UK Printed Circuit Board manufacturers. UK PCB Manufacture since 1964. single sided SS PCB, PTH PCB, IMS PCB, PCB JPG, DFX PCB

ML multi layer printed circuit board  prototypes. Cheap high quality PCBs Printed circuit boards. Fast cheap UK Prototype PCB

Printed circuit boards tooled up from Gerber,JPG,DXF,and most common file types, or camera ready artworks either 2:1 or 1:1 std scale.

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Electroless Tin:-
In it's plain form Electroless tin is not very popular with many assembly companies. As a thin layer it quickly combines with the copper. Often within weeks of manufacture the resultant finish becomes very difficult to solder. This short life span can be increased by increasing the thickness of the tin layer. Traditionally a thicker layer was always rejected as it known to regularly result in tin whiskers forming, which given time would result in short circuits on the PCB.

If used with the tin thickness in a safe range and assembled within a fast timescale, Electroless tin is a very workable finish cost effective. It also has the advantage that if the individual circuit boards are still panelised, should they be too old to assemble the panels can be reworked by stripped off and replating the tin. 

 

Follow this link for more up to date information on Tin whiskers to 

 the NASA Goddard Tin Whisker Homepage.

http://www.nepp.nasa.gov/whisker/index.html

 
 
Organic Coatings Board Finish's

 

 
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