Description:

An IC chip test fixture is designed and fabricated on a PCB test board for the electrical performance testing of integrated circuits. It is used to test various packaged integrated circuit chips, electronic components, CPUs, module core boards, etc.

In the complete chip manufacturing process, chip testing plays a crucial role. Whether it is wafer-level testing before chip dicing or functional electrical testing after packaging, the goal is to identify and improve the yield of defective products. Additionally, before shipping the products, it is necessary to perform relevant reliability verification to estimate the product’s lifespan through accelerated stress tests. Through short-duration high-temperature burn-in, it can identify process defects or early failures, thereby avoiding additional customer return costs. To achieve such conditions and testing environments, it is necessary to plan the test interface before each stage of testing.

Selection of Test Sockets:

The chip test fixture selects appropriate test sockets based on the chip’s packaging type, shape and size, pitch and number of pins. For example, for testing the BGA2577 chip, we must know the chip’s packaging form is BGA, with 2577 pins, pin pitch of 1.0mm, and a chip size of 52.5×52.5mm. These parameters are documented in the chip specification. The chip test fixture selects suitable test sockets and alloy frames based on these parameters.

Depending on the testing requirements, the chip test fixture can be categorized as follows:

Chip testing (continuity, performance, functionality, signal, etc.).

Chip burn-in (programming, writing, erasing, reading, etc.).

Chip aging (high/low temperature, humidity, duration, etc.).

Furthermore, we need to understand chip testing requirements, test temperature, test frequency, test current, etc.

Design and Fabrication Scope:

It includes designing/simulating/fabricating the load board, burn-in board, high-temperature and high-humidity test board (HAST/THB board), board-level reliability test board (BLR test board), and test sockets.

Images of Burn-in Board: