Re: [PEDA] Use Pad Stack

2001-05-07 Thread Abd ul-Rahman Lomax
At 08:40 AM 3/14/01 -0800, Brad Velander wrote: Geoff, Abd-ul Rahman or others following this thread, first I am curious about the comments on routing to a single layer unplated pad. I have single layer unplated pads in most everyone of our designs and find no problem routing to them,

Re: [PEDA] Use Pad Stack

2001-05-07 Thread Brad Velander
PROTECTED]] Sent: Wednesday, March 14, 2001 10:52 AM To: Protel EDA Forum Subject: Re: [PEDA] Use Pad Stack I too use non-plated holes with a pad on a single side, but have always used the multilayer padstack with no problems (99SEsp5, didn't want to change horses in mid stream). I just set the internal

Re: [PEDA] Use Pad Stack

2001-05-07 Thread Geoff Harland
At 11:17 AM 3/14/01 +1100, Geoff Harland wrote: Out of curiosity, what do you suggest should be done in a situation where someone wants an unplated hole through a PCB, and this hole is to pass through the middle of a pad on the bottom (copper) layer? Before making a suggestion, I would

Re: [PEDA] Use Pad Stack

2001-05-07 Thread Abd ul-Rahman Lomax
It's important to realize that CAD programs may be thoroughly checked for bugs, but when they hit the real world, they may be fed data that was not anticipated and therefore the behavior of the program has not been tested. Further, whenever we attempt to do something non-standard, we are not

Re: [PEDA] Use Pad Stack

2001-05-07 Thread David W. Gulley
N-Luo/Yu-Ming ( INC) wrote: I try to use the pads on multilayer using pad stack. I set the top and middle layer pad to 0, and set the hole as a NPTH, But when I chech the gerber file, I noticed a round flash with 8mil diameter on the top solder mask layer. How to solve that? and

Re: [PEDA] Use Pad Stack

2001-05-07 Thread Abd ul-Rahman Lomax
At 11:17 AM 3/14/01 +1100, Geoff Harland wrote: Out of curiosity, what do you suggest should be done in a situation where someone wants an unplated hole through a PCB, and this hole is to pass through the middle of a pad on the bottom (copper) layer? Before making a suggestion, I would

Re: [PEDA] Use Pad Stack

2001-05-07 Thread Geoff Harland
snip As was noted already, it sounds like Luo wants a bottom pad with nothing on the other layers. To accomplish this, simply set the pad attribute to Bottom. There will then be no pad or soldermask geometry on any other layer, assuming that the hole size is zero; and I do not recommend

Re: [PEDA] Use Pad Stack

2001-05-07 Thread Ian Wilson
We seem to be locking horns today ;-) On 05:58 PM 14/03/2001 -0800, Abd ul-Rahman Lomax said: It's important to realize that CAD programs may be thoroughly checked for bugs, but when they hit the real world, they may be fed data that was not anticipated and therefore the behavior of the

Re: [PEDA] Use Pad Stack

2001-05-07 Thread Abd ul-Rahman Lomax
At 03:42 PM 3/15/01 +1100, Ian Wilson wrote: We seem to be locking horns today ;-) If one does not lock horns every so often, they become ingrown. :-) On 05:58 PM 14/03/2001 -0800, Abd ul-Rahman Lomax said: It's important to realize that CAD programs may be thoroughly checked for bugs, but

Re: [PEDA] Use Pad Stack

2001-05-07 Thread Simon
set the solder mask expansion for the pad in the design rules.. (or set the 'tent' option) I prefer to set a rule to allow 10-20 mil larger solder mask on NPTH pads with no copper to stop solder mask running down the hole (if its a liquid) Simon -Original Message- From: N-Luo/Yu-Ming (

Re: [PEDA] Use Pad Stack

2001-05-07 Thread Bruce admin
. After all, isn't that what this forum is all about? Anyhow, read on.. -Original Message- From: [EMAIL PROTECTED] Sent: Wednesday, March 14, 2001 7:44 PM To: Protel EDA Forum [EMAIL PROTECTED] Subject: Re: [PEDA] Use Pad Stack It's important to realize that CAD

Re: [PEDA] Use Pad Stack

2001-05-07 Thread Brad Velander
:(604) 292-9010 email: [EMAIL PROTECTED] www: www.norsat.com -Original Message- From: Ian Wilson [mailto:[EMAIL PROTECTED]] Sent: Wednesday, March 14, 2001 8:43 PM To: Protel EDA Forum Subject: Re: [PEDA] Use Pad Stack SNIP I think: 1) Protel should make sure the drill drawing

Re: [PEDA] Use Pad Stack

2001-05-07 Thread Brad Velander
Message- From: Abd ul-Rahman Lomax [mailto:[EMAIL PROTECTED]] Sent: Wednesday, March 14, 2001 11:12 PM To: Protel EDA Forum Subject: Re: [PEDA] Use Pad Stack I can't do *anything* about either of these factors. But I *can* do something about how I use a program and what I expect

Re: [PEDA] Use Pad Stack

2001-05-07 Thread Abd ul-Rahman Lomax
At 09:18 AM 3/15/01 -0800, Brad Velander wrote: Abd-ul Rahman how can you define a single layer pad with a hole as pushing the envelope? I have used this type of design in at least three CAD packages over the years and extensively in P98, all successfully. So where is it defined that

Re: [PEDA] Use Pad Stack

2001-05-07 Thread Brad Velander
Abd-ul Rahman, Not that it warrants arguing over but you and I just have different views. You say a single layer pad is a SMT pad. I say a single layer pad is the most ancient of all pads and originally in it's concept had a drill even though it is a single layer pad, it was a single

Re: [PEDA] Use Pad Stack

2001-05-07 Thread Frank Gilley
All, Here's another example for non-plated pads on one layer... RF Coax launches. We typically have a grounded pad on the top to solder the shield(s) to, and a non-plated hole leading through the board to a pad in the output microstrip on the bottom. We pull back the shield, poke the

Re: [PEDA] Use Pad Stack

2001-05-07 Thread Abd ul-Rahman Lomax
At 08:43 AM 3/15/01 -0700, Bruce admin wrote: I read your email and thought I would throw in my two cents worth. The following comments are meant more for educational purposes, and not to flame your email. The technology in our field is rapidly changing, and we need to help each other keep

Re: [PEDA] Use Pad Stack

2001-05-07 Thread Abd ul-Rahman Lomax
At 05:55 PM 3/15/01 -0800, Brad Velander wrote: Abd-ul Rahman, Not that it warrants arguing over but you and I just have different views. You say a single layer pad is a SMT pad. I say a single layer pad is the most ancient of all pads and originally in it's concept had a drill even