Any thoughts on attaching wire leads to very fine pitch IC's such as.5mm TSSOP's oreven some of the leadless packages?Yes, the right way to do prototypes is to make a board, or buy abreakout board with the right footprint.But what about the wrong way to do it?Wire wrap wire is just plain too large. Single strands of bare wirepulled out of standed cables can approach working, though soldering istricky and they aren't insulated so have to be routed carefully.Thought about using extremely fine heat-strippable magnet wire... triedunwinding a 32 ohm dollar-store headset but the wire kept breakingbefore I got much unwound.Apparently the metallurgy of an actual wire bonding system isincompatible with tin-lead prepared leads.... (hmm, so how does itwork inside the package - are those ends untinned? could onechemically strip the plating somehow?)Anything workable with conductive epoxy perhaps?

Honestly, believe me, I've tried it. Make a prototype board or buy an adapter, if you value your time and temper at all. By the time you've got the thing hung together you could have had a couple of generations of prototypes.Paul Burke

For dead-bug (and not so dead-bug) construction of fine pitch SMD ICs,have a look at especially employs the 'enamel wiring pen' technique (EWP), Vero wire or theVero Wiring Pen system. It employs 0.2mm 32 AWG polyurethane coatedcopper wire which is rumoured to be also used for inductors and small transformers.Also see Supplies seem to be available from hereThis technique is not for everybody, it requires some fine soldering skills.Some people have difficulty in holding the wire down while soldering.If you are careless, wiring shorts from nicked insulation can be a problem.Gerhard v d BergCSIR

wiring to fine pitch SMD IC's?

Feb 28, 2006 22 Replies

Rate this thread:

Gerhard 20 years ago

For dead-bug (and not so dead-bug) construction of fine pitch SMD ICs, have a look at

formatting link

and especially

formatting link

It employs the 'enamel wiring pen' technique (EWP), Vero wire or the Vero Wiring Pen system. It employs 0.2mm 32 AWG polyurethane coated copper wire which is rumoured to be also used for inductors and small transformers.

Also see

formatting link

Supplies seem to be available from

formatting link

and here

formatting link

This technique is not for everybody, it requires some fine soldering skills. Some people have difficulty in holding the wire down while soldering. If you are careless, wiring shorts from nicked insulation can be a problem.

Gerhard v d Berg CSIR

Vote

Rich Grise, but drunk 20 years ago

I was going to correct you and say, "No, it's dead-BUG", but realized, if you're a hunter, then dead-buck could also work ;-)

Cheers! Rich

-----BEGIN GEEK CODE BLOCK----- Version: 3.1 GAT(E P) dpu s: a++ C++@ P+ L++>+ !E W+ N++ o? K? w-- !O !M !V PS+++ PE Y+ PGP- t 5+++)-; X- R- tv+ b+ DI++++>+ D-? G e+$ h+ r-- z+ ------END GEEK CODE BLOCK------

Vote

Rich Grise 20 years ago

It's not so bad if you bother to get the enamel off first.

Good Luck! Rich

Vote

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required