Texas Instruments makes the tiniest chip for Qi wireless charging4
The chip is available right now at $3.50 a piece, if you buy in a batch of 1000. TI doesn't say which manufacturers have expressed interest, but we've had wireless charging solutions from most of the top cell phone makers now. The chip will allow for thinner phones to get wireless charging capabilities, and is compliant with the prevailing Qi standard.
For more information about the upcoming wireless charging revolution, you can read our in-depth article here.