Sonsivri
 
*
Welcome, Guest. Please login or register.
Did you miss your activation email?
December 06, 2016, 06:41:36 06:41


Login with username, password and session length


Pages: [1]
Print
Author Topic: how to protect pcb?  (Read 1539 times)
0 Members and 1 Guest are viewing this topic.
user112
Junior Member
**
 Muted
Offline Offline

Posts: 84

Thank You
-Given: 6
-Receive: 130


Salut tuturor(hallo to all)


« on: February 05, 2008, 03:57:01 15:57 »

any sugestion?Huh?what do you use?
Logged
ktl
V.I.P
Newbie
*****
Offline Offline

Posts: 32

Thank You
-Given: 6
-Receive: 18


« Reply #1 on: February 05, 2008, 04:03:21 16:03 »

multi-layer, complex lay-out, fake via ...  Tongue
Logged
RsX
Newbie
*
Offline Offline

Posts: 8

Thank You
-Given: 13
-Receive: 1


« Reply #2 on: February 05, 2008, 05:47:53 17:47 »

what?? Shocked
anything normal?  Huh
Logged
bbarney
Moderator
Hero Member
*****
Offline Offline

Posts: 2403

Thank You
-Given: 405
-Receive: 544


Uhm? where did pickit put my mute button


« Reply #3 on: February 05, 2008, 06:18:18 18:18 »

Clear laquer spray paint works just fine
Logged

Ever wonder why Kamikaze pilot's wore helmet's ?
RsX
Newbie
*
Offline Offline

Posts: 8

Thank You
-Given: 13
-Receive: 1


« Reply #4 on: February 05, 2008, 07:18:05 19:18 »

how do you cover the parts of the board that doesn't have to be painted?
like pads... Undecided
« Last Edit: February 05, 2008, 07:26:49 19:26 by RsX » Logged
bbarney
Moderator
Hero Member
*****
Offline Offline

Posts: 2403

Thank You
-Given: 405
-Receive: 544


Uhm? where did pickit put my mute button


« Reply #5 on: February 05, 2008, 07:56:04 19:56 »

you paint it before installing the parts and the paint burns off the tracks when soldering quite easy.
Logged

Ever wonder why Kamikaze pilot's wore helmet's ?
user112
Junior Member
**
 Muted
Offline Offline

Posts: 84

Thank You
-Given: 6
-Receive: 130


Salut tuturor(hallo to all)


« Reply #6 on: February 05, 2008, 08:54:41 20:54 »

I find this http://mgchemicals.com/downloads/appguide/appguide0404.pdf   but in my country I can't obtain it
and this http://www.tme.cz/arts/en/b04/seno-3211__2.html  very expensive for me
« Last Edit: February 09, 2008, 09:55:16 21:55 by user112 » Logged
rtm
Junior Member
**
Offline Offline

Posts: 41

Thank You
-Given: 18
-Receive: 51



« Reply #7 on: February 05, 2008, 09:05:17 21:05 »

I used lacquer for furniture. Few hundred of devices are working under near open sky for 6 years.
Try few lacquers and find suitable one.
Logged
inkwaterman
Guest
« Reply #8 on: February 06, 2008, 09:42:42 09:42 »

I used the Plastik 70 from Kontakt Chemie

http://www.soselectronic.com/a_info/resource/pdf/ine/plastik70.pdf

Is a very good product , fantastic !

Good job
Logged
jzaghal
V.I.P
Active Member
*****
Offline Offline

Posts: 147

Thank You
-Given: 355
-Receive: 49



« Reply #9 on: February 07, 2008, 07:23:51 07:23 »

Hello,

I use thick furniture lacquer. Cheap and good. A small can will last very long.

Usually comes in a metal can. Close it tight.

Bye.
Logged
MAXPAYNE
Hero Member
*****
Offline Offline

Posts: 604

Thank You
-Given: 320
-Receive: 313


It's a little funny......


« Reply #10 on: February 08, 2008, 01:49:55 01:49 »

Hello,

I use thick furniture lacquer. Cheap and good. A small can will last very long.

Usually comes in a metal can. Close it tight.

Bye.

Can you attach some good resolution photo here with lacquer ?
Logged

Whats the Craziest Project u have done lately...?
mylogin
Junior Member
**
Offline Offline

Posts: 72

Thank You
-Given: 9
-Receive: 16


« Reply #11 on: February 08, 2008, 06:45:34 06:45 »

the Plastik 70 from Kontakt Chemie is used in company products.

Acrylic lacquers

Lacquers using acrylic resin, a synthetic polymer, were developed in the 1950s. Acrylic resin is colourless, transparent thermoplastic, obtained by the polymerization of derivatives of acrylic acid. Acrylic is also used in enamels, which have the advantage of not needing to be buffed to obtain a shine. Enamels, however, are slow drying. The advantage of acrylic lacquers, which was recognized by General Motors, is an exceptionally fast drying time. The use of lacquers in automobile finishes was discontinued when tougher, more durable, weather and chemical resistant two-component polyurethane coatings were developed. The system usually consists of a primer, colour coat and clear topcoat, commonly known as clear coat finishes. It is extensively used for wooden finishing

you can use the spray lacquers from DIY home finish store, lots of them to choose. all works well.  the Acrylic lacquers for furnitures are cheap and good. 
Logged
otter
V.I.P
Junior Member
*****
Offline Offline

Posts: 56

Thank You
-Given: 195
-Receive: 2


« Reply #12 on: February 08, 2008, 11:28:21 23:28 »

What are you trying o protect it from? From being copied or to protect from moisture/dirt etc?
Logged
hemlig
Translator
Active Member
***
Offline Offline

Posts: 168

Thank You
-Given: 26
-Receive: 50



« Reply #13 on: February 09, 2008, 12:35:18 00:35 »

I think they want to protect the copper layers from oxidation after etching.
(prevent air to reach the copper surface)

To do that a thin coat of paint from a spray can is enough. I've used liquid plastic in high voltage circuits.
Logged

If it work don't fix it!
maddoc
Newbie
*
Offline Offline

Posts: 32

Thank You
-Given: 49
-Receive: 14


« Reply #14 on: February 09, 2008, 01:26:47 01:26 »

I have very good results protecting the copper from oxidation by using the special compound used in copper pipe soldering.

It is a grey paste, you have to paint it with the included brush over the whole PCB and then put it with the compound upside so the not painted side sits on a flipped over hot iron and leave it there until the paste gets dry, 3-5 minutes. Wash with water and sponge and dry it out.

The PCB will be nicely covered with solder, looking great and ready to put SMD's on it.
Logged
user112
Junior Member
**
 Muted
Offline Offline

Posts: 84

Thank You
-Given: 6
-Receive: 130


Salut tuturor(hallo to all)


« Reply #15 on: February 09, 2008, 09:19:52 09:19 »

What are you trying o protect it from? From being copied or to protect from moisture/dirt etc?

            from moisture/dirt and I think Plastik 70 is a good idea  I find transparent one. It is any posibility to make it green
Logged
jader
Guest
« Reply #16 on: February 24, 2008, 10:17:30 10:17 »

does the laquer make the solder not flow as well?
Logged
mylogin
Junior Member
**
Offline Offline

Posts: 72

Thank You
-Given: 9
-Receive: 16


« Reply #17 on: February 24, 2008, 05:46:58 17:46 »

does the laquer make the solder not flow as well?

You should apply the laquer  after you solder all the parts.  most of the laquer is  not a good solder mask, it will melt if you put the solder on it, also  if you put the solder on it to solder the parts. it might have bad contacts, the melting gas is bad  for your health too.
Logged
Mike G
Guest
« Reply #18 on: February 26, 2008, 06:59:19 18:59 »

I use plastik spray to cover it
Logged
mcr
V.I.P
Junior Member
*****
Offline Offline

Posts: 84

Thank You
-Given: 185
-Receive: 22


« Reply #19 on: February 27, 2008, 02:38:23 02:38 »

What procces name is when the PCB turns green and how can i do it?
Logged
pomidor
Junior Member
**
 Muted
Offline Offline

Posts: 48

Thank You
-Given: 36
-Receive: 90


« Reply #20 on: February 27, 2008, 08:10:46 08:10 »

2mcr

Do you mean solder mask? If so, I heard that some people used photoresist spray with thermohardening (150 C) for this purpose at home.
Logged
Pages: [1]
Print
Jump to:  


DISCLAIMER
WE DONT HOST ANY ILLEGAL FILES ON THE SERVER
USE CONTACT US TO REPORT ILLEGAL FILES
ADMINISTRATORS CANNOT BE HELD RESPONSIBLE FOR USERS POSTS AND LINKS

... Copyright 2003-2999 Sonsivri.to ...
Powered by SMF 1.1.18 | SMF © 2006-2009, Simple Machines LLC | HarzeM Dilber MC