Help with surface mount work Help with surface mount work - diyAudio
Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

Help with surface mount work
Help with surface mount work
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 12th May 2004, 08:12 PM   #1
eeka chu is offline eeka chu  United Kingdom
diyAudio Member
Join Date: Nov 2003
Location: England
Default Help with surface mount work

I've never had a custom PCB made before.

Recently I started having a few cool ideas for things I could make, but I'm kind of stuck on all the ins and outs of having a PCB loaded and soldered.

Is there anywhere that I can read about the details?

For instance... say I have the option to choose between five different styles of package, is it going to be a problem is I suddenly change from using SMA to SMB or D-PAK when all the rest of my components are SOT-223 or SOT-8?

Or, when should I use DIP over SMD? Or even stranger... what's the difference between Dual In-Line Package and Dual In-Line anyway?

I need to know what the manfufacturers will be picky about and want me to change. Things like, what kind of soldering and board layouts I should use?

I would greatly appreciate any help with this!
  Reply With Quote
Old 13th May 2004, 02:39 AM   #2
fab is offline fab  Canada
diyAudio Member
fab's Avatar
Join Date: Mar 2004
Location: Canada
If you intend to populate yourself your pcb, I would not go to use SMD (surface mount devices) devices (SOT-08 and SOT-223). The SMD main purpose is to use less space in pcb but SMD needs automatic pick-and-place machine. I have already worked for several years as a product designer in an hybrid circuit manufacture where normally the SOT-08 or -223 devices were mounted by machine and very occasionnally mounted by humans (re-worked bad mounted circuits). But believe me it is not easy...

Normally in each electronic devices book from distributors or manufacturers (Newark, Arrow, Philips, etc.), theys show a picture and dimensions of each package types. For small transistors, we ususally use TO-92 package. For IC, use DIP. Mid-power transistors are sometimes TO-39 or TO-220. Power transistors TO-220, TO-3, TO-3P, etc.

If you go to a local pcb manufacturer like I do for prototypes, talking with the person who will corrdinate the job will be usefull for you.
If you want to go directly with a professional firm then you can normally:
1) provide yourself the components to them with proper identification based on the silkscreen designation on your pcb.
2) provide the list of devices part numbers with package (of course they must fit with the pcb) that the firm will find for you. They will choose for you the manufacturer of the parts.
3) specify the manufacturer (Motorola, Philips, etc.) along with part number, packages.

For the soldering, use Sn/Pb alloy but for the final specific choice depends on their soldeing process if automatic (flux type, no-flux type, etc.)

The only way to be sure is to talk directly with the proper person at your selected pcb firm.

Good luck!
  Reply With Quote


Help with surface mount workHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Surface mount components! ungie Swap Meet 12 25th September 2009 01:41 PM
Surface mount DIP Sockets? ROBSCIX Parts 6 18th June 2007 03:23 PM
WT: OPA2604 Surface Mount 2x - Will trade DIP mount 2x Destroyer OS Swap Meet 1 22nd December 2006 06:18 AM
Surface Mount equipment rtarbell Parts 0 29th March 2006 01:40 AM
Surface mount is more fun than... PSz. Chip Amps 0 9th April 2004 10:43 PM

New To Site? Need Help?

All times are GMT. The time now is 06:52 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio