Die-attach for high-temperature applications using fineplacer-pressure-sintering (FPS)
A new joining technique called "Fineplacer-Pressure-Sintering" (FPS) for die-attach of small electronic components (e.g. LEDs and photodiodes) is described. Using a modified Flip Chip Bonder, bare dies could be bonded onto substrates with high positioning accuracy. For the FPS process a 50...
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Published in | 3rd Electronics System Integration Technology Conference ESTC pp. 1 - 5 |
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Main Authors | , , , , , |
Format | Conference Proceeding |
Language | English |
Published |
IEEE
01.09.2010
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Subjects | |
Online Access | Get full text |
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Summary: | A new joining technique called "Fineplacer-Pressure-Sintering" (FPS) for die-attach of small electronic components (e.g. LEDs and photodiodes) is described. Using a modified Flip Chip Bonder, bare dies could be bonded onto substrates with high positioning accuracy. For the FPS process a 50 tons press, which is conventionally used for pressure sintering, is no longer required. Very high average shear strengths (63 MPa) were achieved on molybdenum substrates (metallization: Ni/Au). With the help of silver powder of micro-to-nanometre grain size the electrical and mechanical properties of the compound layer could be further increased. The bond strength of metalized GaN-LEDs on Al 2 O 3 substrates with a Ti/Pd/Au metallization is twice as high as with standard micro-powder and the process temperature could be reduced to 200°C. Finally the applicability of FPS was demonstrated by an optoelectronic module consisting of two commercial InGaN-LEDs and GaP-photodiodes on a metalized Al 2 O 3 substrate. Successful function was found with prototype modules at temperatures up to 250°C. |
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ISBN: | 9781424485536 1424485533 |
DOI: | 10.1109/ESTC.2010.5642808 |