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Is soldermask considered an insulator for high vo......


I am designing a power supply circuit that can have voltages up to 100 VDC.According to IPC-2221 I n......

asked by joel lastest answer by johndp

5 years 3 months 29 days

0

votes

1

answers
2895 views

Controlled impedance substrate design


Hello All SI expertsi'm designing 2 layer chip substrate ( not board) that should havedifferential 1......

asked by qantrix

5 years 5 months 16 days

0

votes

0

answers
2392 views

CPW designs


Greetings - Need some PCB fab practices guidance...I'm looking at designing a co-planer waveguide on......

asked by jim.nadolny lastest answer by Gert.Havermann

9 years 2 months 24 days

0

votes

5

answers
2232 views

Microstrip vs. Stripline


Hi Experts,I have 2.5" long interconnects running at 6 Gbps. Currently I am using Microstrip transm......

asked by Ravinder.Ajmani lastest answer by wolfgang.maichen

10 years 7 months

0

votes

7

answers
2122 views

Silver ink usage in High Speed Flex Designs


Hi Experts, In one of our earlier projects, we have used High Speed Flex PCBs. Thestackup of the 3 ......

asked by mohan.svuce lastest answer by weirsi

11 years 2 months 22 days

0

votes

2

answers
1942 views

Re: Request for example transmission line models ......


http://mdtlc.sf.net (sourceforge) Have the basics for single ended and differential. The solder ma......

asked by kgoulet

13 years 6 months 23 days

0

votes

0

answers
1706 views

BGA land pattern


Hello All,This is not a signal uintegrity question. The question regarding BGA land pattern design.O......

asked by aumesh lastest answer by weirsi

13 years 7 months 21 days

0

votes

1

answers
1900 views

diff pair routing at 10gig


Content-Type: text/plain; charset="us-ascii"Content-Transfer-Encoding: quoted-printable=20Hel......

asked by moshef lastest answer by mike

13 years 11 months 6 days

0

votes

1

answers
1912 views

Effects of solder layer on exposed traces


My question is in reference to previous posts that asked about theeffects of solder mask (or silkscr......

asked by mcdevitts lastest answer by gianguida

14 years 12 months 12 days

0

votes

1

answers
1832 views

edge coupled coated microstrip differential imped......


Hi, Gurus,I have couple of questions regarding the edge coupled coated microstrip differential imped......

asked by jerry_hu lastest answer by Charles.Grasso

15 years 2 months 8 days

0

votes

5

answers
3242 views

Paksi-E Model Dielectric Constants


Does anyone have a source for the dielectric constantsfor the following materials?AUS-308 solder mas......

asked by peteharper1 lastest answer by david

15 years 3 months 7 days

0

votes

2

answers
1915 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

Re: Skin Effect, Au, and Cu-->More details...


Good point. I was forgetting how thin the gold plating was w.r.t.typical skin depth of copper at a ......

asked by richard.moffat

16 years 2 months 23 days

0

votes

0

answers
1720 views

Re: What happen to FR4 if exposed under strong E ......


Your question, while I'm sure it's serious, comes close to the category of how many angels fit on th......

asked by fred

16 years 10 months 6 days

0

votes

0

answers
1853 views

Dielectric strength


Hello All, I have few questions related to the creepage and clearance for any PCB dielectric Alth......

asked by esayre3 lastest answer by christopher.heard

16 years 12 months 23 days

0

votes

1

answers
1919 views

Re: [SI-LIST]: Which tool is the best - LINPAR di......


Dear All,LINPAR v2 (what I've got) will indeed handle dielectric abovethe uppermost layer of conduct......

asked by levinpa

17 years 2 days

0

votes

0

answers
1697 views

Re: On the effect of solder mask on Zo - Update


Dear Abe,In the P&D article Eric was using a 20mil wide trace with a 10 mil spacing.In the 2D solver......

asked by Charles.Grasso lastest answer by michael.chan

17 years 2 months 8 days

0

votes

1

answers
1718 views

On the effect of solder mask on Zo


Its about 3ohms per mil. The upper limit is 7mils at this point thesoldermask is essentially infinit......

asked by Charles.Grasso lastest answer by ariazi

17 years 2 months 8 days

0

votes

4

answers
1972 views

Problem with Ni plated transmission line


I have run into an unexpected problem with a Ni plated transmission line.I have fabricated 2 types ......

asked by kuchta lastest answer by kuchta

18 years 1 month 14 days

0

votes

5

answers
2135 views

Re: Loss Tangent of Solder Mask


Michael: I have only one data point. Taiyo PSR-4000BN photoimageablesoldermask has a loss tangent ......

asked by fasig.jonathan lastest answer by cnepsc

18 years 1 month 22 days

0

votes

16

answers
3877 views
1 2
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