Sender: |
|
X-To: |
|
Date: |
Mon, 14 Aug 2000 23:13:05 -0700 |
Reply-To: |
|
Subject: |
|
From: |
|
Content-Transfer-Encoding: |
base64 |
Content-Type: |
text/plain; charset="iso-8859-1" |
Organization: |
LaserVia(tm) Drilling Centers |
MIME-Version: |
1.0 |
Parts/Attachments: |
|
|
Hi Lam,
We have been laser drilling down to the third level for some time now. I do not however, suggest you use RCC, but Epoxy Thermount in the core cap mode. I can send you a drawing of a potential lay-up if you wish.
Larry Burgess
----- Original Message -----
From: Lam, Patrick <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, August 14, 2000 14:27
Subject: [TN] Microvia Connecting Two RCC Layers
> We would like to add two RCC layers each to the top and bottom of an 4-layer
> FR-4 board. Does anyone have experience or suggestion to handle multi RCC
> layers? We would like to have microvia connecting the top RCC layer to the
> outer FR-4 layer, as well as having some microvias connecting both the RCC
> layers to the outer FR-4 layer. Ideally, we would like to have microvias
> connecting three layers without offset drilling. Is it possible to do the
> following: Add one RCC layer, finish the microvia process, add another RCC
> layer on top of the RCC layer, drill microvia at the same drill location as
> the previous RCC layer.
>
> Any information would be highly appreciated.
>
> Patrick Lam
> Glenayre R&D
> Phone:(604)293.4392
>
> ##############################################################
> TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
> ##############################################################
> To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
> the body:
> To subscribe: SUBSCRIBE TECHNET <your full name>
> To unsubscribe: SIGNOFF TECHNET
> ##############################################################
> Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
> information.
> If you need assistance - contact Keach Sasamori at [log in to unmask] or
> 847-509-9700 ext.5315
> ##############################################################
>
|
|
|