I am a small developer of embedded soultions for all types of applications. One my personal interests is with GPS positioning products. To satisfy some previous patent work I was doing I needed a device that would record large amounts of gps data (lots of memory) over a long period of time (big battery) and was compatible with mac's and pc's. Unfortunately, nothing of this sort existed and I had to create a device to do this.
This product is the culmination of implementing a number of new designs for myself. Mainly, using surface mount components, lithium ion/polymer batteries, and Sandisk SD memory cards.
Since so many electronics parts are surface mount these days I needed to use these components but was a little bit fearful in making the leap from using through hole/traditional soldered parts. Sparkfun Electronics helped my learning with their tutorials and I thought I would continue the tradition through an Instructable.
Step 1: APPLY SOLDER PASTE WITH ACRYLIC STENCIL
Picture 2. Tape Top of acrylic stencil to board; make sure it is properly aligned over the pads of your pcb.
Picture 3. Using your preferred solder paste apply a good sized glob to a simple plastic paint spreader
Picture 4. Spread the solder past liberally over your acrylic stencil. Make sure to cover all the holes!
Picture 5. In the next 2-3 passes try and remove as much solder paste from the stencil as possible.
Picture 6. You should have almost the same amount of solder paste your "spatula" as you began with except for the holes in the stencil.
Picture 7. After carefully pulling up your stencil and removing the pcb you would repeat this process for the next board. When complete be sure to remove all solder paste from the stencil. I prefer windex and a toothbrush to clear out soem of the holes for really tight pitch components.