TSV Interconnect Elevator for Low-NRE FPGA-HBM 3D Packaging
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Solution Overview
Problem
The high Non-Recurring Engineering (NRE) cost of designing Application Specific IC (ASIC) or Customer-Owned Tooling (COT) chips using advanced semiconductor technology nodes slows down innovation and increases barriers for implementing advanced IC technology in semiconductor chips.
Innovation Solution
A Field Programmable Gate Array (FPGA)/High Bandwidth Memory (HBM) stacked 3D Chip-Scale-Package (CSP) is proposed, which includes a FPGA IC chip with programmable interconnections and a HBM IC chip or HBM SCSP, stacked using flip-chip bonding or direct bonding, to reduce the need for expensive ASIC or COT designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If ASIC or COT IC chip is designed using advanced semiconductor technology nodes, then performance and power efficiency are improved, but NRE cost increases greatly
Solution Approach 1:
The patent segments the IC design into two parts: a reusable standard cell library (developed once at high NRE cost) and application-specific logic (developed separately at low NRE cost). This allows the expensive advanced technology node to be used for the library, while individual applications can reuse it without bearing the full NRE burden.
Solution Approach 2:
The standard cell library serves multiple applications universally. Once created using advanced technology nodes, the same library can be reused across numerous different ASIC or COT designs, amortizing the high NRE cost over many products and making advanced technology accessible to applications with smaller volume demands.
2Productivity
If ASIC or COT IC chip is designed using advanced semiconductor technology nodes, then performance is improved, but NRE cost increases greatly
Solution Approach 1:
The patent segments the IC design into a reusable standard cell library and application-specific logic. The library is developed once using advanced technology nodes to capture performance benefits, while individual applications can access this performance without repeating the expensive development process.
Solution Approach 2:
The standard cell library is created in advance using advanced technology nodes, performing the expensive development work beforehand. This preliminary action allows subsequent applications to benefit from advanced technology performance without incurring the same high NRE costs.
3Adaptability or versatility
If FPGA IC chip is used for given application, then adaptability is maintained, but chip size is larger, fabrication yield is lower, and fabrication cost is higher
Solution Approach 1:
The patent segments the design into a standardized library and application-specific portions. This allows the library to be optimized for manufacturing efficiency while maintaining the ability to adapt to different applications through the configurable logic layers, achieving a balance between adaptability and manufacturing efficiency.
Solution Approach 2:
The patent changes the parameter of design reconfigurability by providing a middle ground between fixed ASIC and fully reconfigurable FPGA. The standard cell library provides fixed, optimized structures while allowing application-specific customization, achieving better manufacturing efficiency than FPGA while maintaining some adaptability.
Data Source
AI summary
A chip package includes a first integrated-circuit (IC) chip; a second integrated-circuit (IC) chip over the first integrated-circuit (IC) chip; a connector over the first integrated-circuit (IC) chip and on a same horizontal level as the second integrated-circuit (IC) chip, wherein the connector comprises a substrate over the first integrated-circuit (IC) chip and a plurality of through vias vertically extending through the substrate of the connector; a polymer layer over the first integrated-circuit (IC) chip, wherein the polymer layer has a portion between the second integrated-circuit (IC) chip and connector, wherein the polymer layer has a top surface coplanar with a top surface of the second integrated-circuit (IC) chip, a top surface of the substrate of the connector and a top surface of each of the plurality of through vias; and an interconnection scheme on the top surface of the polymer layer, the top surface of the second integrated-circuit (IC) chip, the top surface of the connector and the top surface of each of the plurality of through vias.


