Clamping top plate using magnetic force
View Patent ↗A test fixture, for testing an electronic device, includes: a test platform including electrically conductive contacts protruding from a device receiving surface in the test platform; a positioning guide disposed on the device receiving surface; a device retention cover; where the test platform includes a platform magnetic member and the retention cover includes a cover magnetic member, the platform magnetic member and the cover magnetic member being mutually magnetically attractive. A method of producing an electronic device including: preparing the test fixture, for testing the electronic device; placing the electronic device using the at least one device positioning guide disposed on the device receiving surface; and placing the device retention cover upon the electronic device to apply a force to the electronic device.
1. A test fixture for testing an electronic device, the test fixture comprising:
a test platform including electrically conductive contacts on a device-receiving surface of the test platform;
a plurality of device-positioning guides disposed on the device-receiving surface for positioning the electronic device on the test platform; and
a fully removable cover having a plurality of recesses for mechanically engaging respective device-positioning guides for retaining the electronic device on the test platform;
wherein the removable cover engages the test platform and maintains a clamping pressure through a magnetic attraction between the cover and the test platform for maintaining electrical contact between the electrically conductive contacts and the electronic device, in absence of any mechanical, pneumatic or hydraulic clamping.
2. The test fixture as claimed in claim 1 wherein the fully removable cover comprises a plurality of sockets for receiving cylindrical magnetic inserts that are magnetically attracted to the test platform.
3. The test fixture as claimed in claim 1 wherein the device-positioning guides are cylindrical pins for engaging cylindrical recesses formed in the fully removable cover.
4. The test fixture as claimed in claim 1 wherein the test platform comprises a plurality of cover alignment guides disposed on the device-receiving surface that align with an outside edge of the fully removable cover when disposed in a covered position.
5. The test fixture as claimed in claim 1 wherein the fully removable cover has a test-platform-facing surface with a device-receiving socket.
6. The test fixture as claimed in claim 1 wherein the test platform comprises height-adjustable support legs for supporting differently sized electronic devices.
7. The test fixture as claimed in claim 1 wherein the test platform comprises a containment housing.
8. The test fixture as claimed in claim 7 wherein the containment housing comprises a radio frequency blocking enclosure.
9. The test fixture as claimed in claim 7 wherein the containment housing has a hinged lid.
10. The test fixture as claimed in claim 1 wherein there is a magnetic field between the removable cover and the test platform for maintaining the clamping pressure.
11. A method of testing an electronic device, the method comprising:
preparing a test fixture for testing the electronic device, the test fixture having a test platform including electrically conductive contacts on a device-receiving surface of the test platform;
positioning the electronic device on the test platform using a plurality of device-positioning guides disposed on the device-receiving surface;
placing a fully removable cover upon the electronic device by aligning recesses in the fully removable cover with respective device-positioning guides to apply a clamping force to the electronic device through a magnetic attraction between the cover and the test platform electronic device in the test fixture and maintain electrical contact between the electrically conductive contacts and the electronic device, in absence of any mechanical, pneumatic or hydraulic clamping means.
12. The method as claimed in claim 11 further comprising closing a lid of a containment housing over the test platform after placing the fully removable cover upon the electronic device.
13. The method as claimed in claim 11 further comprising a step of reconfiguring the test platform by relocating guides to different positions to accommodate different electronic devices.
14. The method as claimed in claim 11 wherein there is a magnetic field between the fully removable cover and the test platform for applying the clamping force.
15. A test fixture for testing an electronic device, the test fixture comprising:
a test platform including electrically conductive contacts on a device-receiving surface of the test platform;
a plurality of device-positioning guides disposed on the device-receiving surface for positioning the electronic device on the test platform; and
a fully removable cover having a plurality of recesses for mechanically engaging respective device-positioning guides for retaining the electronic device on the test platform;
wherein the removable cover is brought into engagement with the test platform by a magnetic field, and maintains a clamping force on the electronic device via the magnetic field between the cover and the test platform, in absence of any mechanical, pneumatic or hydraulic means.
16. The test fixture as claimed in claim 15 wherein a clamping pressure is maintained between the removable cover and the test platform when the removable cover is brought into engagement with the test platform.
17. The test fixture as claimed in claim 15 wherein the fully removable cover comprises a plurality of sockets for receiving cylindrical magnetic inserts that are magnetically attracted to the test platform.
18. The test fixture as claimed in claim 15 wherein the test platform comprises a containment housing.
19. The test fixture as claimed in claim 18 wherein the containment housing comprises a radio frequency blocking enclosure.
20. The test fixture as claimed in claim 15 wherein the test platform comprises height-adjustable support legs for supporting differently sized electronic devices.