Patent ID: 8257538

Claim:
A device transfer method comprising: arranging a plurality of first devices on a continuous temporary adhesion layer formed on a first substrate; embedding the first devices arranged on the temporary adhesion layer of the first substrate into a pressure sensitive adhesive layer provided on a second substrate, wherein a plurality of second devices have been embedded into the pressure sensitive adhesive layer prior to embedding the first devices therein; and stripping the first devices from the first substrate before hardening the entire pressure sensitive adhesive layer so as to hold the first devices in an embedded state in the pressure sensitive adhesive layer; and hardening the entire pressure sensitive adhesive layer after the first devices are held along with the second devices in the embedded state in the pressure sensitive adhesive layer, wherein the entire pressure sensitive adhesive layer remains uncured for successive device transfer steps, and wherein for each embedding step, the first devices are transferred from the first substrate to the second substrate such that the just transferred first devices are spaced from each other with a pitch of the first devices on the second substrate that is at least substantially equal to a pitch of the first devices arrayed on the first substrate.