Need fine soldering help
I need help soldering some fine three conductor (two plus shield) to a batch of ten very tiny Knowles SiSonic MEMS microphones:
http://www.digikey.com/product-detail/en/SPV0840LR5H-B/423-1214-1-ND/4376286
2.75mm L x 1.85mm W x 1.00mm H
I have some yards of the coax on a spool that a tech friend gave me long ago and have no idea where I could get more. It is flattened and is narrower and thinner than the MEMS. Picture included of cable, MEMS and a sewing pin for reference.
My 70 year old hands are just not still enough any more for the task (if they ever were) and I'm willing to pay to get it done. Getting the coax end splayed for the photo seriously taxed my ability. :-)
Discussions
4 years ago
What you need is solder paste, a soldering microscope and a reflow oven. The paste comes in a small syringe so you can apply it to the small pads. The soldering scope will help you see what your doing so you can apply the paste and place the wire into the paste. The reflow oven or old toaster oven is needed to melt the paste into place. Then you can inspect your work in the scope to ensure no solder bridges. Pair of treezers may come in handy as well.
Reply 4 years ago
I appreciate the advice but it is not something I'm capable of following. I'm trying to find someone that is.
Reply 4 years ago
SO you want someone to do the work for you? Check to see if there is a vocational high school near you. There Electronics students could easily do it for you.
Reply 4 years ago
I thought I made that clear. It's not about the work, it's about the tremors.
4 years ago
Yikes, what you need is some of these surface mount device breakout boards http://www.adafruit.com/products/1230. But you are still in need of doing surface mount soldering to those tiny pads on the chip. Not fun at all. Good luck.
Reply 4 years ago
Thanks but I need to keep the form factor as tiny as the device is. Breakout boards, I'm afraid, defeat that purpose.
Reply 4 years ago
Any hackerspaces near you or tech schools? Too much heat with a normal soldering iron will destroy those pads(I know) and you need a really super fine tip if you don't have the solder paste/reflow oven/hotair rework setup.