Mitsubishi D2101V Cellular Phone
Released by NTT DoCoMo in March 2002, the D2101V is a continuation of the FOMA handset line and the first to use i-motion video-clip and music transmission service with a videophone. The 3G phone features a single, fixed digital camera that allows viewing from two directions: one for real time videoconferencing and the other for taking photographs or making videos. The phone also features a large 132x162-pixel color display and has a data transfer rate of 384Kbps (packet transmission) or 64Kbps for videophone calls.
Components of Interest:
- Dual Chip BGA Package assembled with Adhesive Flip Chip
The first use of adhesive flip chip bonding of a large processor type IC that was made even more notable by having two chips bonded on both sides of a substrate. Also notable was that the chips were extraordinarily thin. - Stacked Processor ICs
Stacked memory chips (e.g. combinations of Flash and SRAM) have become common place; but this is the first observed instance of two large processor ICs being stacked.
 Main Board Die Products |
 Video Processor Dual Chip BGA |
 Baseband and Apps Processor - Dual Chip BGA |
 Bottom side of the dual processor package |
 MCM's on Display Board |
Conclusions:
- Packaging for the complex end of the handset spectrum is moving towards IC device stacking (the 3rd dimension).
- MCPs are being developed that combine baseband processors and memory. AMD has two separate agreements with TI and LSI Logic. AMD will co-develop MCPs that combine its 0.18µ 128Mb flash devices with baseband processors from TI or LSI Logic.
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