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October 2008

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Subject:
Re: Process question-Pls reply urgently....!
From:
Lee Whiteman <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Tue, 14 Oct 2008 14:28:20 -0400
Content-Type:
text/plain
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text/plain (144 lines) 
Roger,

I never heard of HASL over gold. I am assuming that the gold is
deposited (?) over the copper pads, then HASL is performed. 

What are the advantages of this finish over ENIG and straight HASL?

Why would a board be finished like that? Just curious.

Lee Whiteman, PMP
Senior Member Engineering Staff
L-3 Communications East
Telephone: (856) 338-3508
FAX: (856) 338-2906
E-Mail: [log in to unmask]
 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Roger Stoops
Sent: Tuesday, October 14, 2008 2:22 PM
To: [log in to unmask]
Subject: Re: [TN] Process question-Pls reply urgently....!

Gold and silver are deposited by chemical methods.  Solder, both
lead-free and lead/tin, are deposited by HASL.  HASL solder can be
applied after gold finish, as in the case of gold-plated edge fingers.

HASL = Hot Air Solder Leveling

Roger 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of anand paliwal
Sent: Tuesday, October 14, 2008 2:19 PM
To: [log in to unmask]
Subject: Re: [TN] Process question-Pls reply urgently....!

 could that melting metal would be the gold, silver, ?

thanks for the reply

regards,
Anand
On Tue, Oct 14, 2008 at 12:08 PM, <[log in to unmask]> wrote:

>
> Anand
> HASL is not applied over other finishes, to the best of my knowledge.

> HASL is a process for putting a melting metal onto a copper substrate.
>
> Doug Pauls
> Rockwell Collins
>
>
>   *anand paliwal <[log in to unmask]>* Sent by: TechNet 
> <[log in to unmask]>
>
> 10/14/2008 12:40 PM   Please respond to
> TechNet E-Mail Forum <[log in to unmask]>; Please respond to anand 
> paliwal <[log in to unmask]>
>
>    To
> [log in to unmask]  cc
>   Subject
> [TN] Process question-Pls reply urgently....!
>
>
>
>
>  Hi All,
>
> I have One question Does the HASL Applied after gold plating ?
>
> is HASL can be used for Different Plating finish ?
>
> Thanks
> --
> With Best Regards,
> Anand
>
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>


--
With Best Regards,
Anand Paliwal

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