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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." <[log in to unmask]>, ÀÌ¹Î¼ö" <[log in to unmask]>
Date:	Wed, 26 May 1999 19:38:58 +0900
Content-Type:	text/plain
Parts/Attachments:	text/plain (1 lines)

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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