PCB Libraries Forum Homepage
Forum Home Forum Home > Libraries > Footprints / Land Patterns
  New Posts New Posts RSS Feed - CTI respected in footprints?
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

CTI respected in footprints?

 Post Reply Post Reply
Author
Message
StachowJ View Drop Down
New User
New User


Joined: 17 Oct 2018
Status: Offline
Points: 7
Post Options Post Options   Thanks (0) Thanks(0)   Quote StachowJ Quote  Post ReplyReply Direct Link To This Post Topic: CTI respected in footprints?
    Posted: 20 May 2022 at 4:27am
Hi,
question to librarians mostly.
Do you respect CTI requirements in designed footprints?
Lastly I had a discussion in my organization about CTI for our products. 
We mostly use CTI 400 for laminate, but silkscreen legend has CTI 175. This reduces the allowed electrical distance between two potentials on the board.
A good example is electrolytic capacitor, where entire negative side is covered with silkscreen.
Did you ever investigated such case?

Are you libraries common and PCB designers apply adjustments, or you design them specifically for plenty of requirements ?

I asked the question: when buying tiles for your new bathroom, do you expect getting ones with already cut holes for your water outlets or you drill it depends on needs at construction side? Silence as an answer.

What's your company's approach? 
Back to Top
Tom H View Drop Down
Admin Group
Admin Group
Avatar

Joined: 05 Jan 2012
Location: San Diego, CA
Status: Offline
Points: 5151
Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 2022 at 8:14am
CTI has never been a consideration in land pattern (footprint) requirements in any IPC Standards. 


Stay connected - follow us! Twitter - LinkedIn
Back to Top
StachowJ View Drop Down
New User
New User


Joined: 17 Oct 2018
Status: Offline
Points: 7
Post Options Post Options   Thanks (0) Thanks(0)   Quote StachowJ Quote  Post ReplyReply Direct Link To This Post Posted: 23 May 2022 at 2:04am
Thanks Tom,

Anyway, does someone consider CTI on the library level?

What's your general approach guys? Do you maintain it on PCB design level, or you implement it in the library?

Do you think is a good approach? 

I am pushed to redesign my footprints according CTI requirements (like modify silkscreen legend from ElCap (negative pin marking).
Back to Top
 Post Reply Post Reply

Forum Jump Forum Permissions View Drop Down



This page was generated in 0.063 seconds.