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August 2008

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Subject:
From:
Reuven Rokah <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Reuven Rokah <[log in to unmask]>
Date:
Thu, 14 Aug 2008 21:29:17 +0300
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170-180 is Okay

Best Regards



Reuven ROKAH



e mail: [log in to unmask]

Think green before printing this mail... Thanks



-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge

Sent: Thursday, August 14, 2008 9:01 PM

To: [log in to unmask]

Subject: Re: [TN] TG 130 or Tg 170 for ENIG



We have tried superhigh Tg  (210 Centigrades) FR4 boards. Promising, but

expensive and few makers. Anyone with experience? Example:



http://www.parkelectro.com/parkelectro/images/PWB%20Dielectric%20Substrates%20for%20Pb%20Free%20Assembly2.pdf



Inge





----- Original Message -----

From: "Douglas O. Pauls" <[log in to unmask]>

To: <[log in to unmask]>

Sent: Thursday, August 14, 2008 9:23 AM

Subject: Re: [TN] TG 130 or Tg 170 for ENIG





>I don't know if it is a "standard practice", but I would certainly

> recommend it.  You need the extra margin that the higher Tg gives.

>

> Doug Pauls

>

>

>

>

> Lenny Carter <[log in to unmask]>

> Sent by: TechNet <[log in to unmask]>

> 08/14/2008 11:19 AM

> Please respond to

> TechNet E-Mail Forum <[log in to unmask]>; Please respond to

> Lenny Carter <[log in to unmask]>

>

>

> To

> [log in to unmask]

> cc

>

> Subject

> [TN] TG 130 or Tg 170 for ENIG

>

>

>

>

>

>

> Hey technetters- We adopted the ENIG finish for our RoHS compliant parts 2

> years ago.  We recently had discussions with our primary pcb vendor and

> they

> recommended we switch to a Tg170 FR4 material for our pcbs instead of our

> standard Tg130 we have been using for years.

> This recommendation was made because of the higher reflow temperatures

> necessary for the lead free process.

>

> Is this standard practice?  we are a little hesitant to make the switch as

> it would mean an approximate 5%price increase on all our pcbs.

>

> Any input is appreciated.

>

> thanks, Lenny Carter  ERG, Inc.   www.ergpower.com

>

>

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