2.5D integration

www.3dic.org/2.5D integration

2.5D integration refers to the technology that stacks active chips side-by-side on a passive Si/glass interposer (or the intel's embedded multi-die interconnect bridge, EMIB), which enables high density chip-to-chip interconnects.

Si interposer


Xilinx Virtex-7 Interposer-based FPGAs

See main article 3D FPGA.

The Xilinx 2.5D FPGAs from the Virtex-7 family fabricated by TSMC using the CoWoS technology are the first commercially available silicon interposer-based FPGAs.

GPU and HBM DRAM on Si Interposer

The AMD Radeon R9 Fury X GPU released in June 2015 uses the 2.5 integration, in which HBM stacks and GPU are assembled on a Si interposer side-by-side. Another example is the Nvidia Tesla P100 GPU with HBM2 3D DRAM. It was officially announced in April 2016.

Announcement Date Company Product HBM 1&2 Packaging Technology
June 2015 AMD Radeon R9 Fury X GPU (Fiji) HBM1
April 2016 Nvidia Tesla P100 GPU HBM2 CoWoS

Embedded Multi-die Interconnect Bridge (EMIB)

See main article EMIB.

Embedded Multi-die Interconnect Bridge (EMIB) is an approach developed by Intel to in-package high density interconnect of heterogeneous chips. The EMIB contains no TSVs and is smaller comparing to interposer.

Altera FPGA with EMIB and HBM DRAM

See main article 3D FPGA.

Altera has launched the Stratix 10 FPGA which consists of HBM2 3D DRAM combined with FPGAs by using the EMIB.

Glass interposer