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A Lab for Glass Skew, Glass Stop & Other PCB Design Challenges

9/13/2013 11:00 AM EDT
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kfield
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Another note about Peg
kfield   9/14/2013 2:15:10 PM
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I interviewed Peg and was so impressed when she told me she went back to school to get a chemistry degree after working in industrys for awhile--I think that takes a lot of courage, and pluck.

Sanjib.A
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Re: Another note about Peg
Sanjib.A   9/15/2013 8:12:36 AM
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True, it takes a lot of courage and without strong dedication, determination it is tough to go back to academics!! Really appreciate!

The skew problem for the high speed (>20Gbps) differential pairs routing due to FR4 weaving possess routing challenges as she has mentioned. Good to know that there are materials such as "GigaSync" available. What would be the premium price of such material over ordinary FR4 material?

 

MeasurementBlues
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Re: Another note about Peg
MeasurementBlues   9/16/2013 10:30:53 PM
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@Sanjib, the Isola people provided links for more information in the comments at Glass Weave Skew Problems May Be Solved.

JanineLove
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Test challenges
JanineLove   9/16/2013 9:02:29 AM
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I'm thinking about Peg's comment: <<My boss once came up to me and told me that we had to find some way to test a material -- and we had 15 minutes to come up with a new test>>. What are the greatest assets for team members at a lab like this? What should students be studying in school if they want a job in an analytical lab?

BekahT
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Re: Test challenges
BekahT   9/16/2013 2:45:51 PM
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Depends on the analytical issue; most issues will be a combination of material science, chemistry and mechanical engineering.  If it is a signal issue, it could be an electrical engineering test.  The best training is on the job, but there are many labs that students now have access to in the later years of undergraduate or graduate work at research universities.  At ASU we had many cross discipline labs, for instance we had more than a couple that combined material science and mechanical engineering.  So many of these disciplines run into each other these days, it is nice to know that there is training available if students are actively seeking a lab to work in.  I think one of the greatest assets I have was the experience working in one of these labs that combined chemistry on one side and material science with device testing on the other.

MeasurementBlues
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Re: Test challenges
MeasurementBlues   9/16/2013 10:34:53 PM
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Another problem with glass weave is that the weave differs from vendor to vendor.

JanineLove
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Materials Science
JanineLove   9/16/2013 9:05:04 AM
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I find materials science fascinating. I may be dating myself, but when I was in college I don't recall a materials science dept. You could be an engineer, or a chemist, or a chemical engineer (which sounds like it should be materials science, but is vastly different). Now, i know there is a large materials science program at my alma mater, the Univeristy of Delaware. What do you think of the materials science academic programs out there?

kfield
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Re: Materials Science
kfield   9/16/2013 12:43:54 PM
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@janinelove Materials science was a core curriculum at the University of Minnesota when I went to school, and I am more dated than you. :-) My husband also got his degree in materials science at MIT in the 1970s, only I am sure then the materials being studied were much different than today!!!

JanineLove
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Re: Materials Science
JanineLove   9/16/2013 12:58:10 PM
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Ack. Maybe U of DE had it then too. I was too busy hanging out with the Chemists, ChemEs, EEs and MechEs. :-)

BekahT
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Re: Materials Science
BekahT   9/16/2013 3:18:35 PM
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As far as the material science programs out there, that will depend on the school.  Obviously MIT has been at it for a while, so that is a great program.  Many of these programs started out under centers that where dedicated to solid state research as soon as universities got their hands on electron microscopes.  They were born out of this cross discipline of physics, chemistry, biology, and engineering.  Our solid state program at ASU started in 1974.  In most schools the material science departments are now in the engineering schools, and they have grown very big.  Some of the better programs are MIT, UW, UCSD, UC Berkley, UFL, Northwestern, and ASU!

MeasurementBlues
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Re: Materials Science
MeasurementBlues   9/16/2013 10:26:56 PM
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At WPI, materials science fell under mechanical engineering.

MeasurementBlues
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Two related posts on DesignCon Community
MeasurementBlues   9/16/2013 4:36:56 PM
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We have two related postes and many comments about Isola and glass skew in high-speed differential signals. It's a big issue among desisners of high-speed digital systems.

Glass Weave Skew Problems May Be Solved by Eric Bogatin

Glass Weave Needs a Standard by Lee Ritchey

From DesignCon Community

 

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