Microfluidic Assembly Segmentation for Pre-Mount Testing
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Solution Overview
Problem
Traditional inkjet systems face significant assembly time and cost issues due to the need for electrical testing after all semiconductor dies are coupled to the interconnect substrate, leading to the scrapping of entire assemblies if one die fails testing.
Innovation Solution
A microfluidic assembly with an interconnect substrate coupled to a microfluidic die featuring a ledge with bond pads, allowing for electrical testing before mounting, and using conductive elements and encapsulant to protect and secure the connections, enabling individual burn-in and testing of each assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional inkjet systems use an inkjet die attached to a substrate with rigid or flexible interconnect substrate, then precision placement of the die is achieved, but electrical testing must occur after all dies are coupled to the interconnect substrate, causing entire assemblies to be scrapped if one die fails testing
Solution Approach 1:
The system divides the assembly into modular units where each semiconductor die is individually mounted on its own interconnect substrate before being mounted to the substrate. This segmentation allows independent testing of each module, so that if one die fails, only that specific module is scrapped, not the entire assembly. The modular architecture enables parallel processing and reduces overall assembly time.
Solution Approach 2:
Each semiconductor die undergoes electrical testing and burn-in procedures before being mounted to the interconnect substrate. This preliminary action ensures that defective dies are identified and removed early in the process, preventing them from affecting other dies. The testing is performed on individual dies or small groups before final assembly, allowing for early detection and isolation of failures.
2Ease of manufacture
If all semiconductor dies are mounted to substrate and coupled to interconnect substrate before electrical testing, then assembly process is simplified, but material usage increases and cost increases due to scrapping entire assemblies
Solution Approach 1:
The system segments the assembly process into independent modules, where each semiconductor die is mounted on its own interconnect substrate. This segmentation allows for selective scrapping of only the defective module rather than the entire assembly, significantly reducing material waste and cost. The modular design enables precise tracking and management of individual components.
Solution Approach 2:
Electrical testing and burn-in procedures are performed on individual semiconductor dies before they are mounted to the interconnect substrate. This preliminary testing identifies defective dies early, allowing them to be removed from production before they are assembled into the final product, thereby reducing material loss and associated costs.
3Productivity
If electrical testing is performed after all dies are coupled to interconnect substrate, then assembly process is streamlined, but reliability of the overall assembly decreases due to inability to isolate failures
Solution Approach 1:
The system segments the electrical testing process into individual die-level tests performed before assembly. Each semiconductor die is tested independently on its own interconnect substrate, allowing for precise identification and isolation of failures. This segmentation maintains high assembly efficiency while improving reliability by enabling targeted replacement of only the defective module.
Solution Approach 2:
Electrical testing is performed as a preliminary action on each semiconductor die before mounting to the interconnect substrate. This early testing establishes a baseline for each die's functionality and allows for the isolation of defective units. The preliminary testing ensures that only qualified dies proceed to assembly, maintaining high assembly efficiency while improving overall reliability.
Data Source
AI summary
One or more embodiments are directed to a microfluidic assembly that includes an interconnect substrate coupled to a microfluidic die. In one embodiment, the microfluidic die includes a ledge with a plurality of bond pads. The microfluidic assembly further includes an interconnect substrate having an end resting on the ledge proximate the bond pads. In another embodiment, the interconnect substrate abuts a side surface of the ledge or is located proximate the ledge. Conductive elements couple the microfluidic die to contacts of the interconnect substrate. Encapsulant is located over the conductive elements, the bond pads, the contacts.