High-PAS™ - Chip Scale Package Testing on Film Frame
USEA has developed proprietary technology for the highly parallel testing of chip scale packages on a film frame. This advanced form of strip testing offers a much more efficient work flow and product yield than other chip scale package handling techniques.
Placement of components next to probe - BEST`s High-PAS™ technology is the only solution for placing discrete components directly next to the device under test for devices. The strategy allows for testing otherwise not possible and for increasing test yield.
Increased throughput (UPH) - When testing at high volume, USEA's High-PAS™ technology dramatically increases the test speed for chip scale, bumped die, and cingulated die on the film frame handler. This is achieved through elimination of jams associated with turret and gravity feed handlers, reduced indexing time between tests, and reduced engineer supervision requirements.
Reduced Tooling Costs - The tooling costs for handling chip scale packages on handlers such as turret and gravity feed handlers are avoided when handling the parts on the film frame handler.
Reduced Engineering Setup Costs - The engineering time required to implement a change kit on turret and gravity feed handlers is eliminated and replaced with a lower effort alignment procedure on the film frame handler.
Tri-Temperature Testing - USEA's film frame handler strategy allows for the testing of parts at multiple temperatures ranging from -40°C to 85°C.
Reduced Test Costs - The increased throughput of testing coupled with lower engineering setup costs and associated NRE results in a lower test cost and higher customer margins.
Test After Saw - The mechanical and chemical damage to parts that sometimes occurs during the saw process is screened for using the High-PAS™ testing after saw technology.
TRADITIONAL STRATEGY
The traditional strategy for handling CSP is to cingulated the devices on the film frame and then to separate the devices from the film frame. The flaw in this strategy is that the devices are first highly ordered and so easy to handle and test. Once the devices are cingulated and then separated from the film frame they become disordered an effort has to go back into re-ordering them and checking their orientation for test and packing, see Figure below.
High-PAS STRATEGY
In the BEST High-PAS solution for CSP the devices are left on the frame after cingulation. The devices are wholly separated from one another, but left on the film frame. The advantage to BEST's customers and collaborators is that their devices are highly ordered and in their optimum configuration for testing and packing all the way through the process, without effort to re-order and check their configuration through the process, see the Figure below.
