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| Reply To: | TechNet E-Mail Forum. |
| Date: | Mon, 28 Jun 2004 09:32:09 +0800 |
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Greetings Mustafa,
Two points that effect OSP, thickness and storage conditions.
If the OSP is too thin, the oxidizing copper will turn reddish.
Here, we seal the OSP finished boards within 20 hours to reduce moisture absorption in the OSP.
If left exposed to the air, this finish will normally turn darker.
I have a friend from Izmir who loves to talk about the sea there. How far is that from you?
Larry Russell
http://www.chantworld.com
-----Original Message-----
From: Baski Devre [mailto:[log in to unmask]]
Sent: Saturday, June 26, 2004 3:41 PM
To: [log in to unmask]
Subject: [TN] OSP-carbon buttons- normal pads turns brown by time
Dear colleagues,
PCBs that include some nets have one end point carbon buttons and other end
point normal pad, are covered with OSP the normal pads turns brown by time.
Can you explain What is its reason?
Best Regards,
Mustafa YUCEL
Product Quality Engineer
BASKI DEVRE SAN. ve TIC. LTD. STI.
Ceyhan Sk. No:10 81490 Pendik-Istanbul-Turkey
Tel: 00 90 216 3901036 (4 Hat/Line)
00 90 216 4836560 (4 Hat/Line)
Fax: 00 90 216 3544941
00 90 216 4913269
Internet: www.baskidevre.com.tr
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