Choose a good fixture manufacturer and talk to them.
At least one fixture manufacturer will do a FEA of your board and the
fixture to ensure correct low stress hold down.
In the past we have tested thin PTFE based pcbs using a lid which held
down the whole of the back of the board (single sided).
You have not said if your uut is single or double sided, mixed
technology etc.
Regards
Rex

Rex Waygood
Technical Manager
 
Hansatech EMS provides value manufacturing through engineering and
quality
 
Hansatech EMS Limited
Benson Road
Nuffield Industrial Estate
Poole
Dorset
BH17 0RY
 
+44 (0)1202 338200
 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Gobinathan Athimolom
Sent: 08 March 2010 07:37
To: [log in to unmask]
Subject: [TN] PCBA Test

Hello Technet,

 

I'm looking forward your invaluable input concerning ICT test on PCB
that has thickness of 1.2mm (0.0472") in total. What are the issues that
we might run into if the PCB (thickness 1.2mm) is subjected to ICT using
press down fixture instead of vacuum fixture? In term of reliability and
repeatability.

 

Thanks,

Gobi

 

 


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