Electrical conductivity the reciprocal of electrical resistivity, and measures a material's ability to conduct an electric current. It is commonly represented by the Greek letter σ (sigma),
How to create a "fuse" in a PCB?
Can anyone share their experience(s) with designs that have failed due toexcessive heat caused by ex......
asked by jeff.loyer lastest answer by jrbarnes
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Upcoming Webinar on Trace Current/Temperature rel......
I will be giving a webinar hosted by C-Therm Technologies entitled "Thermal Conductivity of Printed ......
asked by dbrooks9
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Thermal properties of old pcbs
I am reviewing an old article (1968) in which it refers to "copper conductors an epoxy glass" and "c......
asked by dbrooks9 lastest answer by leeritchey
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votes3
answers
tolerance on components
hi si-list,I am looking for information on tolerance of SMD capacitors, to bemore specific the: the......
asked by jan.vercammen1 lastest answer by weirsi
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votes2
answers
conductivity of PCB tracks
hi si-list,I need help on the resistivity of copper tracks of a 2-layer PCBIt concerns a RFID reader......
asked by jan.vercammen1 lastest answer by weirsi
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votes1
answers
S-params vs. TDR/TDT results
Zhenggang's question regarding "s-parameters looking the same while TDRshows differences" got me thi......
asked by jeff.loyer lastest answer by jeff.loyer
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votes4
answers
material information
Hello, All. For modeling using HFSS, I'm looking for information about some materials. - tungstem >......
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volume resistivity (or conductivity) of printed c......
hello SI-list,I am looking for data on the volume resistivity (or conductivity) glass-epoxy (= print......
asked by jan.vercammen1 lastest answer by dp
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votes2
answers
thermal via in BGA's
hi,i'm using a BGA324(1553 ACE) in my design and its power rating is 2W andfor thermal considera......
asked by chandramohan lastest answer by john.levieux
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votes1
answers
Dielectric loss modeling
Hi, Gurus,One topic confused me for a long time, I look forward somebody here can help me to clarify......
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answers
Effect of Temperature on Metal Conductivity
Dear AllIs there any effect of temperature on metal conductivity? In another word, does the resistan......
asked by zhang_kun lastest answer by Craig.Sullivan
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votes6
answers
FR4 PCB material thermal study
Hello Gurus, I need to understand the properties (like, inplane thermal conductivity, thr......
asked by sivakumar_skm lastest answer by r.moser
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votes1
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Re: Enquiry on using Polyline to draw the CPW Cop......
Toh,If you don't care about the metal thickness, you can give the polylinesurface a "finite conducti......
asked by pzilaro
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votes0
answers
Hspice Fieldsolver Question
Hi,I got an error "Singular MOM Matrix" when running Hspice fieldsolver,the source code is at below.......
asked by bowen.liu lastest answer by Tracy.Barclay
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votes5
answers
IMD and substrate thickness
Hi,Can anyone let me know the typical values of the inter-metal-dielectricthickness (IMD) used in CM......
asked by bhadhua
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votes0
answers
permeabilty
HiI was just wondering if someone can help me out with these values.I need them to differentiate bet......
asked by atifshamimkhan
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answers
loss tangent calculation
HelloI am designing an antenna on Si substrate (resistivity = 300 ohm -cm) at 24 Ghz.I want to calcu......
asked by atifshamimkhan lastest answer by jian
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votes5
answers
Doping effects.
Hi all, If doping increases the conductivity of Silicon , why cant we attain superconducti......
asked by rfengg lastest answer by justin.tabatchnick
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votes5
answers
Loss in HSPICE W Element
Hi,I have made a 100 Ohm differential microstrip trace using the HSPICE fieldsolver. I am trying to ......
asked by Timothy.Coyle lastest answer by everaeal
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votes3
answers
Skin Effect Calculation
It sounds like an old and well estabilished subject on skin depthcalculation. But here is what happ......
asked by Pat_Diao lastest answer by mike_bihan
6
answers