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We developed a new chip-to-wafer 3D integration technology using self-assembly and electrostatic (SAE) bonding. High-throughput multichip self-assembly with a high alignment accuracy within 1 μm was achieved by the SAE bonding technique. Self-assembled known good dies (KGDs) were temporarily bonded on SAE carriers by electrostatic bonding force. We implemented multichip transfer processes twice and...
We proposed a new chip-to-wafer 3D integration technology using hybrid self-assembly and electrostatic temporary bonding. In the hybrid self-assembly-based chip-to-wafer 3D integration (HSA-CtW), liquid surface-tension-driven chip self-assembly is combined with high-speed robotic pick-and-place chip assembly and electrostatic multichip temporary bonding. Hybrid self-assembly can realize high-throughput...
Two key technologies consisting of chip-to-wafer bonding through a non-conductive film (NCF) and wafer-level packaging using compression molding were studied for self-assembly-based 3D integration, especially reconfigured wafer-to-wafer stacking. 4-mm-by-5-mm chips having 20-μm-pitch Cu-SnAg microbumps were successfully bonded to wafers through NCF. The resulting daisy chain obtained from the chip-to-wafer...
Chip-to-wafer bonding is a promising technology for 3D integration due to high production yield using known good dies (KGDs). However, conventional chip-to-wafer 3D integration lowers production throughput because pick-and-place chip assembly is employed. To overcome the problem, we proposed a new chip-to-wafer 3D integration using self-assembly by which many KGDs can be simultaneously, rapidly, and...
We have newly proposed heterogeneous multi-chip module integration technologies in which MEMS and LSI chips are mounted on Si or flexible substrates using a self-assembly method. A large numbers of chips were precisely and simultaneously self-assembled and bonded onto the substrates with high alignment accuracy of approximately 400 nm. Thick MEMS and LSI chips with a thickness of more than 100 mum...
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