Comments on: 7/1/08 Smooth copper foils for extra low loss http://bethesignal.net/blog/?p=17 Where Signal Integrity Understanding Begins Tue, 27 Apr 2010 03:24:50 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Pavan http://bethesignal.net/blog/?p=17&cpage=1#comment-6401 Pavan Fri, 19 Mar 2010 12:04:41 +0000 http://bethesignal.net/blog/?p=17#comment-6401 Hi Eric, Its been really good article but need more thorough explanation towards the topic elsewhere it is really good. I have gone through the preview edition of your book "SIGNAL INTEGRITY- Simplified". Its really good explanation there. I wanna purchase it through PRENTICE HALL but they told me that it is not available in India. Can you help me?? Regards, Pavan Vora Design Engineer (AMIE) Hi Eric,

Its been really good article but need more thorough explanation towards the topic elsewhere it is really good.

I have gone through the preview edition of your book “SIGNAL INTEGRITY- Simplified”. Its really good explanation there. I wanna purchase it through PRENTICE HALL but they told me that it is not available in India.

Can you help me??

Regards,

Pavan Vora
Design Engineer (AMIE)

]]> By: sandrar http://bethesignal.net/blog/?p=17&cpage=1#comment-4830 sandrar Thu, 10 Sep 2009 14:55:24 +0000 http://bethesignal.net/blog/?p=17#comment-4830 Hi! I was surfing and found your blog post... nice! I love your blog. :) Cheers! Sandra. R. Hi! I was surfing and found your blog post… nice! I love your blog. :) Cheers! Sandra. R.

]]> By: Jose http://bethesignal.net/blog/?p=17&cpage=1#comment-21 Jose Mon, 28 Jul 2008 12:15:45 +0000 http://bethesignal.net/blog/?p=17#comment-21 Hi, Great article. In my case (test fixtures for test and measurement) any improvement on loss is great news. On the RO4350 comment, I though RO4350 requires a very special type of rough copper to be used to get the needed adesion. I don't think we cannot choose what kind of copper is used on RO4350 and I'm not sure if RO4350 can handle a very smooth copper. Jose Hi,

Great article. In my case (test fixtures for test and measurement) any improvement on loss is great news.

On the RO4350 comment, I though RO4350 requires a very special type of rough copper to be used to get the needed adesion. I don’t think we cannot choose what kind of copper is used on RO4350 and I’m not sure if RO4350 can handle a very smooth copper.

Jose

]]> By: Colin Warwick http://bethesignal.net/blog/?p=17&cpage=1#comment-4 Colin Warwick Thu, 24 Jul 2008 16:44:28 +0000 http://bethesignal.net/blog/?p=17#comment-4 Inspired by this article, I just upgrade my interactive skin effect page to include the Hammerstad empirical roughness model http://signal-integrity-tips.com/2008/skin-effect-crisis/ Inspired by this article, I just upgrade my interactive skin effect page to include the Hammerstad empirical roughness model http://signal-integrity-tips.com/2008/skin-effect-crisis/

]]> By: Colin Warwick http://bethesignal.net/blog/?p=17&cpage=1#comment-3 Colin Warwick Thu, 24 Jul 2008 16:35:28 +0000 http://bethesignal.net/blog/?p=17#comment-3 Hi Eric, Great article. One question. You say Surface roughness has the effect of increasing the losses of a 5 mil wide line to appear as lossy as a 3.5 mil wide line. Shoudn't this be "Surface roughness has the effect of increasing the losses of a 5 mil wide line to appear as lossy as a 2.5 mil wide line." ? To offset the effect of halving the current depth, you have to double the width. Hi Eric, Great article. One question. You say Surface roughness has the effect of increasing the losses of a 5 mil wide line to appear as lossy as a 3.5 mil wide line.
Shoudn’t this be “Surface roughness has the effect of increasing the losses of a 5 mil wide line to appear as lossy as a 2.5 mil wide line.” ? To offset the effect of halving the current depth, you have to double the width.

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