Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 12, Issue 9, Pages 1198-1200Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/68.874234
Keywords
electrophoresis; flip-chip bonding; hybrid electronics; InGaAs LED
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In this letter we demonstrate an electrophoretic process for assembling very small devices on a silicon circuit. A 20-mu m diameter InGaAs LED was fabricated and then released from the substrate by etching a sacrificial layer underneath the diode structure. The diode, placed into a buffer solution over the silicon circuit, was positioned onto the circuit's tin/lead contact electrodes by biasing the contacts to establish. an electrophoretic current in the buffer solution, Following removal from the buffer solution, the assembly was heated to reflow the solder, Circuit formation and LED activation is demonstrated by forward biasing the LED using the silicon circuit's contacts.
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