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Site Stepping#

A test that can be used to step along a wafermap route and execute all child tests until the end of route is reached.

Description#

Steps to the submitted (sub)site of the next die in the stepping route. If target subsite is not routable, an error occurs. If Subsite Index is omitted, target subsite is the currently active subsite and target die is the next one within the stepping route where target subsite is routable. Only executable if routing is active and currently active die is part of the route.

Input parameters#

The test requires to select a probe station, added in the device manager.

Parameter Description
Include all active sub-sites Includes all active sub-sites into the stepping routine. When the last sub-site at a Die is reached the test will step to the first sub-site of the next die.
Automatically move chuck to contact Moves the chuck to contact automatically after each stepping movement.

Output parameters#

The test does not provide output parameters.

Supported devices#

The following devices are supported by this test:

  • MPI SENTIO Software Suite
  • Accretech UF200
  • Velox Software Suite (FormFactor Inc.)

Example#

Hardware setup:

Connect a supported Waferprober to the computer running Measmatic over TCP/IP, GPIB or RS232. 

flowchart LR
    A(Measmatic) o---o |TCP/IP, 
    GPIB or 
    RS232| B(Waferprober)

In the device manager add the Waferprober to the current test site configuration. Change the name, the IP address in the device properties of the device. If needed, increase the communication timeout for the probe station device.

Measmatic setup: or

  1. Add a Site Stepping test to the test sequence by dragging and dropping a Site Stepping test from the test picker into the test sequence. Set the Probe station in the Site Stepping test to be the Probe station added in the device manager. Enable Automatically move chuck to contact . Alternatively enable Include all active sub-sites.

  2. Add a measurement test into the Site Stepping loop. Set the Test output parameters and select a fail bin criteria. In the Example a Demo Data generator creates float numbers between 0 and 100 with a test pass criteria of a result between 25 and 75.

  3. Add Set bin into the Site Stepping loop. Set the Probe station in the Site Stepping test to be the Probe station added in the device manager.

  4. Execute the test sequence by pressing the Run all tests button.

See also:

Subsite Stepping Set Bin