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Subject:	Re: Compare CEM-1, CEM-3 and FR4
From:	ÀÌ¹Î¼ö <[log in to unmask]>
Reply To:	TechNet E-Mail Forum.
Date:	Fri, 4 Jun 1999 14:21:57 +0900
Content-Type:	text/plain
Parts/Attachments:	text/plain (1 lines)

I sent this a week ago but I could not see it in my mail box.

Is there somthing wrong with mail delivery?



> Tom

> CEM-1 is composed of paper, glass and epoxy resin.

> The raw materials for CEM-3 and FR-4 are fiberglass and epoxy resin.

> The main difference between them is the form of reinforcement.

> The reinforcement for CEM-3 is a combination of woven glass and non-woven glass web.

> On the other hand, FR-4 use all  woven glass. 

> The overall performance of FR-4 is better than that of CEM-3, which is better than that of CEM-1. The cost is, you may guess, the complete reverse.

> In terms of processibility, CEM-1 and CEM-3 are punchable.

> One has to use a drill to process FR-4.

> Of course, it is a general view so there may be exceptions for special grades.

> We, Doosan Electro-materials, offer a variety of quality base materials including CEM-1, CEM-3, and FR-4 at competitive price.  

> If you are interested, please call Mr. Kim who is our US office manager at 408-733-3553.

> 

> Minsu Lee

> Associate Manager

> R&D Dept.

> Doosan Electro-materials.

> 

> ----- Original Message ----- 

> From: Tom Burek <[log in to unmask]>

> To: <[log in to unmask]>

> Sent: Wednesday, May 26, 1999 7:25 AM

> Subject: [TN] Compare CEM-1, CEM-3 and FR4

> 

> 

> > Can anyone tell me what CEM-3 is?  How does this differ from CEM-1 and FR4?  Is there a WEB site that list this information in one site?

> > Thank You,

> > 

> > Tom Burek

> > [log in to unmask]

> > 

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