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On Thu, Jul 20, 2017 at 10:35 PM, Richard Wilbur richard.wilbur@gmail.com wrote:
On Thu, Jul 20, 2017 at 10:07 AM, Luke Kenneth Casson Leighton lkcl@lkcl.net wrote:
On Tue, Jun 27, 2017 at 4:56 AM, Richard Wilbur richard.wilbur@gmail.com wrote:
In the interest of solving the challenge of integrating the HDMI connector, I have a few questions:
[...]
- How many copper layers does this board have?
6
Okay, that didn't change since the last time you answered this. (You just answered the more complete version of my reply sent back on 27 Jun. I accidentally sent it before I finished writing it--and then sent the complete version after I finished writing it. You replied in June to the incomplete version of the message and today to the complete version. Sorry for causing any confusion as I am still making peace with the user interface of my smart phone E-mail client--which I'm thankfully not using right now.)
i had a pre-prepared response which i'd not sent. saw the questions, answered them, hit send... then realised i'd seen them before :)
- What is the minimum trace size?
5mil
- What is the minimum trace spacing?
5mil.
Did you change pcb fabricators recently?
no.
In June you said the minimum trace size and spacing were 3.5mil.
yep that's another board.
Just want to be sure I'm working with the right numbers.
5mil.
- Is the minimum plated through hole diameter 6 mil?
yes. with a 12mil surround.
[...]
The Amphenol part has 0.15mm clearance between lands for even row of pins and board edge in cutout while Molex 468753011 has 0.9mm clearance in the same spot.
i'll be using the JAE DC3 because the pins are exposed, meaning that standard oven baking can be used. the amphenol part the pins are covered over, meaning that a second pass of solder reflow is needed. that costs money... and sometimes doesn't work anyway.
Sounds like an improvement in manufacturability. Which part are you using? These are all mid-mount micro-HDMI receptacles.
correct.
DC3R019JA7R1500 0.65mm 0.65
this one lines up with the micro-hdmi and usb-otg connector.
l.