Re: [SI-LIST] : PCB Build

L D Miller ([email protected])
Wed, 27 Aug 1997 08:12:05 -0700

1. I think it stands for polypropylethylene or some such thing. It is used
in microwave PCB designs.

2. I think it costs more.

3. Dr Howard Johnson ("High Speed Digital Design", p. 159) considers it
unnecessary at 1 GHz and below.

Larry Miller
Bay Networks

At 01:33 PM 8/27/97 +0100, you wrote:
>During the course of designing PCBs for operation at frequencies >70MHz
>our OCB manufacturer has offered us the use of 'PPE' rather than FR4.
>Does anyone out there have any experience or info about PPE including
>what it stands for!
>Best regards,
>Vince Harradine.