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),

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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

5 years 2 months 22 days

0

votes

6

answers
3509 views

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

5 years 3 months 14 days

0

votes

0

answers
2058 views

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

6 years 4 months 6 days

0

votes

3

answers
2113 views

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

10 years 5 months 18 days

0

votes

2

answers
2171 views

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

10 years 9 months 29 days

0

votes

1

answers
2036 views

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

13 years 7 months 18 days

0

votes

4

answers
2221 views

material information


Hello, All. For modeling using HFSS, I'm looking for information about some materials. - tungstem >......

asked by yamma1106 lastest answer by johndp

14 years 6 months 25 days

0

votes

1

answers
1816 views

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

15 years 11 months 14 days

0

votes

2

answers
1914 views

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

16 years 4 months

0

votes

1

answers
1792 views

Dielectric loss modeling


Hi, Gurus,One topic confused me for a long time, I look forward somebody here can help me to clarify......

asked by sogo.hsu lastest answer by burke

16 years 4 months 16 days

0

votes

4

answers
1906 views

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

16 years 5 months 25 days

0

votes

6

answers
1940 views

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

16 years 8 months 6 days

0

votes

1

answers
2277 views

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

17 years 4 months 11 days

0

votes

0

answers
1922 views

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

17 years 5 months 29 days

0

votes

5

answers
2007 views

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

17 years 5 months 10 days

0

votes

0

answers
1757 views

permeabilty


HiI was just wondering if someone can help me out with these values.I need them to differentiate bet......

asked by atifshamimkhan

17 years 6 months 9 days

0

votes

0

answers
1819 views

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

18 years 24 days

0

votes

5

answers
2105 views

Doping effects.


Hi all, If doping increases the conductivity of Silicon , why cant we attain superconducti......

asked by rfengg lastest answer by justin.tabatchnick

18 years 1 month 7 days

0

votes

5

answers
1909 views

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

18 years 1 month 14 days

0

votes

3

answers
1975 views

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

18 years 1 month 23 days

0

votes

1

answers
1606 views
1 2
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