XPS Handlers

The XPS handler is a tri-temp in line test handling system, reel / ammopack to reel handler for taped semiconductors especially four-pin axial Hall sensor testing. The machine tape transport operates in a synchronously way, thus assuring precise device tracking.

There are two main modifications of the XPS handlers:

• XPSC - equipped with two-category cutters;
• XPSP - equipped with four-category puncher and cutter.

The XPS Handlers consist of eight blocks:

• Loader and Input Buffer;
• Test Site Hot;
• Synchronization Buffer;
• Test Site Ambient;
• Synchronization Buffer;
• Test Site Cold;
• Cutter / Category Puncher;
• Unloader;

The loader is a tray or unreel module with integrated buffering system.

Devices are pulled through the 3 in line test sites by means of stepper motors with an accuracy of 0.05mm.

The test sequence is Hot (125 °C / 150 °C), Ambient and Cold (typically -40 °C), each test site has his own soak area which is controlled by PID controllers except for the ambient section. Small buffers are used to synchronize the devices (data log, characterization, trimming), by means of "deliver one, then pull out another" principle, controlled by sensors and error trapping.

Due to the nature of Hall components (small package) the contact blocks are temperature controlled as well, to avoid the device to change temperature while contacting and testing (unrelated with test time). The cold section uses a patented cooling technique for -40 °C, using no liquid nitrogen based on cooling liquid and Peltier effect.

Each test section has an integrated reference sensor and an electromagnet, capable of generating a 600Gauss positive or negative field, aligned around the DUT. The Unloader reel which is the last section is preceded by a two bin category bulk cutter sections or one bulk cutter with a four-category puncher.

The option category puncher has to be selected when one want to use the tape later on to produce consecutive "same bin" tapes using our XRET re-taper.

Reliability

High uptime with excellent device tracking, fast reloading and low meantime to repair.

Optical detection is used to align the device into the contact block, while a sensor controlled mechanism is used to track and assure device tracking. A reference magnetic sensor is used to feedback the applied magnetic field at the DUT's position.

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