Schematic view of loop height testing
Schematic view of loop height testing

How to test bonds » Wire Pull » loop height, work holder and clamping

...this is page 4; click here to go to page 3.

8. Loop height measurement

On the previous page, triangulation was discussed. In order to make the desired force calculations, a loop height measurement is required. Bond testers are traditionally used for force measurement only, but one can also use the positional accuracy to measure distances with the same wire pull sensors. Advanced bond testers can even combine the measurement of loop heights with wire pull tests. Click here for more information on loop height measurements.

9. Work holder and clamping

If the sample is not firmly and rigidly clamped, test time increases, displacement data is wrong and test data becomes less tight and reliableIf the sample is not firmly and rigidly clamped, test time increases, displacement data is wrong and test data becomes less tight and reliable

In the illustration, two tests are simulated. The one on top shows the best measurement, when the sample is clamped to the base. In the one on the bottom, the sample is not clamped. Hence,

  • Sample movement results in longer test time and displacement
  • If the test time is longer the true test speed is slower
  • Different test speeds give different peak forces
  • Variable clamping increases error and distribution

Continue to read:

Previous page: Alignment

Next page: Variants on wire pull

How to test bonds?

Wire Pull:

www.wirepull.how

Thin wire gold pull test
Thin wire gold pull test
  1. Introduction
  2. What is wire pull?
  3. What kind of wires can be tested?
  4. Objectives
  5. Tool design
  6. Tool quality
    1. Material and damage
    2. Hook concentricity
  7. Alignment
    1. Quick manual testing of thin wire
    2. Auto hook
    3. DVS 2811
    4. Triangulation
    5. Automation and wire detect
  8. Loop height measurement
  9. Work holder and clamping
  10. Variants on wire pull
    1. Vector pull
    2. SMD gull wing leads
  11. Test method settings
    1. Test definition
    2. Statistical Process Control (SPC)
    3. Data analysis
    4. Data export
  12. Failure modes
    1. Gold wire
    2. Aluminium wire
  13. Appendices
    1. Force calculations
    2. MIL-STD-883 2011.9 destructive
    3. MIL-STD-883 2023.7 non-destructive
    4. MIL-STD-883 2023.7 Appendix A

Cold Bump Pull:

www.coldbumppull.how

Click here if you wish to learn everything there is to know about Cold Bump Pull (CBP). The extensive how-to on CBP consists of 13 paragraphs and 7 pages.

Tweezer Pull:

www.tweezerpull.how

Click here if you wish to learn everything there is to know about Tweezer Pull. The extensive how-to on Tweezer Pull consists of 9 paragraphs and 6 pages.


Test types

How to test bonds?

Wire Pull:

www.wirepull.how

Thin wire gold pull test
Thin wire gold pull test
  1. Introduction
  2. What is wire pull?
  3. What kind of wires can be tested?
  4. Objectives
  5. Tool design
  6. Tool quality
    1. Material and damage
    2. Hook concentricity
  7. Alignment
    1. Quick manual testing of thin wire
    2. Auto hook
    3. DVS 2811
    4. Triangulation
    5. Automation and wire detect
  8. Loop height measurement
  9. Work holder and clamping
  10. Variants on wire pull
    1. Vector pull
    2. SMD gull wing leads
  11. Test method settings
    1. Test definition
    2. Statistical Process Control (SPC)
    3. Data analysis
    4. Data export
  12. Failure modes
    1. Gold wire
    2. Aluminium wire
  13. Appendices
    1. Force calculations
    2. MIL-STD-883 2011.9 destructive
    3. MIL-STD-883 2023.7 non-destructive
    4. MIL-STD-883 2023.7 Appendix A

Cold Bump Pull:

www.coldbumppull.how

Click here if you wish to learn everything there is to know about Cold Bump Pull (CBP). The extensive how-to on CBP consists of 13 paragraphs and 7 pages.

Tweezer Pull:

www.tweezerpull.how

Click here if you wish to learn everything there is to know about Tweezer Pull. The extensive how-to on Tweezer Pull consists of 9 paragraphs and 6 pages.


Test types


© 1999-2016 XYZTEC BV Disclaimer, Privacy, Cookies
Home
News
Condor Sigma
Condor 150HF
Test types
Markets & solutions
Sales & support
Downloads
Events
Shop

XYZTEC Netherlands

J.F. Kennedylaan 14-B
5981 XC Panningen
Netherlands (map / route)

Tel: +31-77-3060920
Fax: +31-77-3060919

Find your local representative

XYZTEC Germany

Schäferei 18
06237 Leuna
OT Günthersdorf
Germany
(map / route)
Tel: +49-34638-666690
Fax: +49-34638-666695
Cell: +49-172-3272991
Email: Dirk Schade

Find other office locations

Technology leader in bond testing worldwide