IC Packaging with Adhesive Tape Singulation and Step Encapsulation

The substrate is divided into multiple isolation regions, with each region containing a specific chip and its associated test structures. This segmentation allows independent testing and evaluation of each chip before final package assembly, so that a failure in one chip does not necessarily condemn the entire package. The isolation regions act as independent test chambers that can be individually assessed.

Test structures are formed in the isolation regions before the chips are mounted and before the final encapsulation is applied. This preliminary testing allows identification of defective chips or interconnect issues early in the manufacturing process, enabling selective rework or replacement of only the problematic components rather than discarding the entire package.

The test structure formation process is merged with the existing chip mounting and encapsulation processes. The same encapsulation material and curing conditions used for protecting the chips also protect the test structures. This integration eliminates the need for separate test structure fabrication steps, reducing manufacturing complexity while maintaining the ability to perform preliminary testing.

The isolation regions serve multiple functions: they provide physical isolation for individual chip testing, they contain test structures that enable preliminary evaluation, and they maintain compatibility with standard encapsulation processes. This multi-functionality reduces the need for specialized equipment or processes while achieving the goal of improved reliability through preliminary testing.