Jacob,

IPC.ORG has a page to download the IPC-SM-840 specification you're after.

Good luck trying to find the Bellcore Spec. I've searched and searched to no avail. I finally had the customer send me the specific requirements they requested us to comply with. In my opinion, if the customer requires a supplier to meet a certain specification, they should provide that specification. To date we have not had a customer deny this request.

It's interesting that they would request compliance with both specifications (IPC ~v~ Bellcore) as there are some distinct differences between the two, especially for solder mask.

If they give you a choice, choose the IPC specification.

Good luck.

Franklin
-----Original Message-----
From: JACOB MOZEL <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: Tuesday, September 28, 1999 3:17 AM
Subject: [TN] IPC and Bellcore specs


Deat TechNetters 

I was asked to test a solder mask according to the down-listed specs, could anyone advise where are thse specs avilable.




IPC-SMA-40 
Bellcore TSI-4078 
TR-TSI-000078 (equivalent to BS) 

Thanks and regards 

Jacob Mozel