From: Dwayne Reid <dwayner@planet.eon.net>
To: pic microcontroller discussion list <piclist@mit.edu>
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Date: Wed, 18 Aug 2021 10:32:55 -0700
Subject: [EE] PCB manufacturer not wanting to put UL 94V-0 mark on  boards
Thread-Topic: [EE] PCB manufacturer not wanting to put UL 94V-0 mark on
  boards
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Good day to all.

I'm looking for advice.  Because this advice requires opinions, I=20
can't ask on Stack Exchange.

Good old PIClist to the rescue!

We use a couple of Chinese PCB manufacturers to make our bare circuit=20
boards.  Both have given us good service over the past many years but=20
prices have been increasing faster than other suppliers **AND**=20
delivery times have been getting longer.

I keep seeing recommendations for a PCB company called JLCPCB.  Their=20
prices gook good and the delivery times are also good.

I've ordered from them a couple of times.  The only problem is that=20
one of our production orders (600 pcs) did not have the UL flame=20
marking "94V-0" on the boards, even though that requirement was=20
clearly communicated to them both in the readme.txt file contained=20
within the ZIP file as well as direct remarks on the order page.

Although I did raise this problem with them after the boards were=20
received, I never did get a reply.

I've just ordered another 3 board designs from them - two are=20
prototype quantities (10 pcs each) and a tiny production run of 100 pcs.

Again, I specified that the PCB material must be UL rated and that=20
the 94V-0 mark must be on the silkscreen.

This time, they got back to me and stated "They cannot modify the=20
customer-supplied silkscreen."  Quite frankly, that is a total load=20
of fooey.  They do add a production number string to the=20
silkscreen.  I pointed that out to the person with whom I have been=20
communicating - they just said the same thing.

So far as I know, it is illegal for ME to add the UL mark to my=20
design files.  The reason given to me was that the certifying=20
authority doesn't know if the PCB material does actually meet UL=20
requirements.  What I have been told, and what has happened with=20
every other PCB manufacturer, is that the manufacturer adds the UL=20
mark to the silkscreen when the films are processed.

What I'm asking for is a reality check.  Is it reasonable for me to=20
specify that the PCB material must be UL certified **AND** that the=20
PCB manufacturer must add the UL mark to the boards when they are manufactu=
red?

How do I go about ensuring that JLCPCB does what I ask?

Opinions greatly appreciated.

Many thanks!

dwayne

--=20
Dwayne Reid   <dwayner@planet.eon.net>
Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
780-489-3199 voice   780-487-6397 fax   888-489-3199 Toll Free
www.trinity-electronics.com
Custom Electronics Design and Manufacturing

--=20
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