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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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