| T O P I C R E V I E W |
| rbuck |
Posted - 20 Jun 2014 : 23:03:29
Using V16.0.8.
I have a complex 4 layer board (13cm x13cm), with over 200 components that currently has some traces that are 10 mils wide. The top and bottom layers are 6 oz copper as the circuit has to carry as much as 40 amps in some places. The client has been making this board for over 2 years with no problem.
Now the board house is saying due to the 6 oz copper they have to increase the etch time which may result in poor yields due to the 10 mil traces. Which is strange as there haven't been any poor yields for the last 2 years and their etch times have been sufficient in the past.
The client wants me to go through the board and increase all 10 mil traces to 15 mils which will meet the board house specifications for good yield.
Is there a way to highlight all the 10 mil traces so I won't have to click on hundreds of traces to check the size? Along the same lines, is there a way to highlight all pads of a certain size?
Ray |
| 5 L A T E S T R E P L I E S (Newest First) |
| rbuck |
Posted - 21 Jun 2014 : 21:39:00
Thanks Iain. I finally decided that was the only option. |
| Iain Wilkie |
Posted - 21 Jun 2014 : 18:10:04
Change your track width from 10 to 15 using the method the Edrees gave. Now set up your drc to find 15 thou spacing violations and step through these editing as you go.
Iain |
| rbuck |
Posted - 21 Jun 2014 : 16:29:31
Edrees,
Thanks for the suggestion for the traces. I want to select and change the traces one at a time as I need to adjust spacing between traces and traces and pads. The board house says as long as we have minimum 15 mil traces and 15 mil spacing there won't be any issues. This is a board house that has specialized in 6 oz boards for over 10 years. They say the new requirements are so they can adhere to IPC guidelines. I guess I will just have to hunt and peck for the traces.
Thanks for the Pad tip. I have wished many times in the past to be able to do that. I never knew that option was there. It is well hidden.  |
| edrees |
Posted - 21 Jun 2014 : 13:22:12
Assuming that the pcb was designed in EPC the first time around, then the 10 thou track would most ptobably be allocated a track style. Simply edit the track style from 10 thou to 15 thou.
Even then I would still expect significant under-cut-etch with 6 oz copper thickness. 6oz copper is ~8.5 thou thick, so you only have a <2:1 aspect ratio with 15 thou tracks! What about plating copper onto copper?
Pad sizes. GOTO => Pad styles, select style required from drop down menu, then right click, then click SELECT ALL FIND ITEMS. |
| edrees |
Posted - 21 Jun 2014 : 01:51:29
Assuming that the pcb was designed in EPC the first time around, then the 10 thou track would most ptobably be allocated a track style. Simply edit the track style from 10 thou to 15 thou.
Even then I would still expect significant under-cut-etch with 6 oz copper thickness. |
