Message is undeliverable.
Reason: Unable to access cc:Mail Post office.
Please retry later.
Original text follows:
---------------------
Received: from elexsys by smtp-gateway (ccMail Link to SMTP R6.00.01)
; Tue, 03 Jun 97 16:39:31 -0800
Return-Path: <[log in to unmask]>
Received: (from fw@localhost) by elexsys (SMI-8.6/8.6.12) id QAA19726 for <[log in to unmask]>; Tue, 3 Jun 1997 16:49:41 -0700
Resent-Date: Tue, 3 Jun 1997 16:49:41 -0700
Received: FROM kani.wwa.com(198.49.174.58) BY mail.elexsys.com(206.25.13.10) VIA Moonsite-Firewall:SMTP Proxy-Agent/1.0; Tue Jun 3 16:49:29 1997
Received: from ipc.org/ipc.ipc.org [209.42.29.23] by kani.wwa.com with smtp
(Smail3.2.WWA) id m0wZ3G2-004JWcC; Tue, 3 Jun 1997 18:45:40 -0500 (CDT)
Received: by ipc.org (Smail3.1.28.1 #2)
id m0wZ36H-000BjeC; Tue, 3 Jun 97 18:34 CDT
Resent-Sender: [log in to unmask]
Old-Return-Path: <[log in to unmask]>
Message-Id: <[log in to unmask]>
Date: Wed, 04 Jun 1997 08:44:51 +0900
From: Motoyo Wajima <[log in to unmask]>
To: Motoyo Wajima <[log in to unmask]>
Cc: [log in to unmask], [log in to unmask]
Subject: Re: fab: drilling
In-Reply-To: <[log in to unmask]>
MIME-Version: 1.0
X-Mailer: AL-Mail 1.22
Content-Type: text/plain; charset=iso-2022-jp
Resent-Message-ID: <"3xKST1.0.NN7.EeAbp"@ipc>
Resent-From: [log in to unmask]
X-Mailing-List: <[log in to unmask]> archive/latest/13130
X-Loop: [log in to unmask]
Precedence: list
Resent-Sender: [log in to unmask]
Motoyo Wajima <[log in to unmask]> さんは書きました：
>Hi Susan!
> It depends on the thickness of PWB and the drill diameter.
>
>No.of Stack Thickness of PWB Drill Diameter TotalAspectRatio
> (mils) (mils)
> 4 63(double sided) 24 10.5
> 3 31(multilayer) 12 7.8
> 2 63(multilayer) 16 7.9
> 2 39(multilayer) 12 6.5
> 1 63〜(multilayer) 12〜 5.3〜
>Drill bit bending increase in higher aspect ratio.
>Regards,
>Motoyo Wajima
>General Purpose Computer Division,Hitachi,Ltd.(JAPAN)
>
>[log in to unmask] さんは書きました：
>>One of my customers has a question regarding stack
>>height for multilayer printed boards for drilling.
>>
>>When I was building boards, I drilled only one at a time.
>>However, we were not producing high volumes of boards
>>and all I can think of is why I wouldn't want to do it.
>>
>>Do any of you have experience drilling more than one
>>panel of multilayers at a time? What are your criteria
>>for determining when to stack and how many?
>>
>>Thanks,
>>Susan Mansilla
>>Robisan Lab
>>
>>***************************************************************************
>>* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
>>***************************************************************************
>>* To subscribe/unsubscribe send a message <to: [log in to unmask]> *
>>* with <subject: subscribe/unsubscribe> and no text in the body. *
>>***************************************************************************
>>* If you are having a problem with the IPC TechNet forum please contact *
>>* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] *
>>***************************************************************************
>>
>>
>
>***********************************************
>Motoyo Wajima
>General Purpose Computer Division,Hitachi,Ltd.
>1 Horiyamashita
>Hadano-shi,Kanagawa-ken,259-13 Japan
>E-mail:[log in to unmask]
>Fax:+81-463-88-2935
>***********************************************
***********************************************
Motoyo Wajima
General Purpose Computer Division,Hitachi,Ltd.
1 Horiyamashita
Hadano-shi,Kanagawa-ken,259-13 Japan
E-mail:[log in to unmask]
Fax:+81-463-88-2935
***********************************************
***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To subscribe/unsubscribe send a message <to: [log in to unmask]> *
* with <subject: subscribe/unsubscribe> and no text in the body. *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] *
***************************************************************************
|
