Method for generating a performance metric for a tensilized tape

1. A method for generating an anti-shrink to delta creep amplitude performance metric for a tensilized tape, the method comprising:

determining a zero point of the tensilized tape;

determining a total length of the tensilized tape;

generating a zero point ratio by dividing the zero point of the tensilized tape by the total length of the tensilized tape; and

generating the anti-shrink to delta creep amplitude performance metric by subtracting the zero point ratio from a constant.

2. The method of claim 1 wherein the constant is substantially 0.5.

3. The method of claim 1 wherein the step of determining the zero point of the tensilized tape comprises determining a point on a longitudinal axis of the tensilized tape where compressive stress balances tensile stress, wherein the point is measured with reference to an end portion of the tensilized tape proximate a hub.

4. The method of claim 1 wherein the tensilized tape is magnetic tape.

5. The method of claim 1 wherein the tensilized tape is optical tape.

6. The method of claim 1 further comprising the step of tuning the tensilized tape using the anti-shrink to delta creep amplitude performance metric such that the tensilized tape is made less prone to distortion.

7. The method of claim 1 further comprising the step of generating at least one of a shrink specification and a creep specification using the anti-shrink to delta creep amplitude performance metric.

8. A method for generating an anti-shrink performance metric for a tensilized tape, the method comprising:

determining a zero point of the tensilized tape;

determining a total length of the tensilized tape;

generating a zero point ratio by dividing the zero point of the tensilized tape by the total length of the tensilized tape;

generating an anti-shrink to delta creep amplitude ratio by subtracting the zero point ratio from a constant;

determining an initial creep amplitude of the tensilized tape;

applying a stressor to the tensilized tape;

determining a final creep amplitude of the tensilized tape;

generating a delta creep amplitude by subtracting the initial creep amplitude from the final creep amplitude; and

generating the anti-shrink performance metric by multiplying the anti-shrink to delta creep amplitude ratio by the delta creep amplitude.

9. The method of claim 8 wherein the constant is substantially 0.5.

10. The method of claim 8 wherein the step of determining the zero point of the tensilized tape comprises determining a point on a longitudinal axis of the tensilized tape where compressive stress balances tensile stress, wherein the point is measured with reference to an end portion of the tensilized tape proximate a hub.

11. The method of claim 8 further comprising the step of tuning the tensilized tape using the anti-shrink performance metric such that the tensilized tape is made less prone to distortion.

12. The method of claim 8 further comprising the step of generating at least one of a shrink specification and a creep specification using the anti-shrink performance metric.

13. The method of claim 8 wherein the step of applying a stressor to the tensilized tape comprises baking the tensilized tape.

14. The method of claim 8 wherein the step of applying a stressor to the tensilized tape comprises baking the tensilized tape at least two times.

15. The method of claim 8 further comprising the steps of:

determining an anti-shrink value of the tensilized tape, wherein the anti-shrink value is determined after applying a stressor to the tensilized tape; and

generating a quality rating for the tensilized tape based at least in part on the anti-shrink value and the anti-shrink performance metric.

16. The method of claim 8 wherein the tensilized tape is magnetic tape.

17. The method of claim 8 wherein the tensilized tape is optical tape.

18. A computer-readable medium storing a program executable by a computer for generating an anti-shrink performance metric for a tensilized tape, the medium comprising:

a zero point code segment for determining a zero point of the tensilized tape;

a total length code segment for determining a total length of the tensilized tape;

a zero point ratio code segment for generating a zero point ratio by dividing the zero point of the tensilized tape by the total length of the tensilized tape;

an anti-shrink to delta creep amplitude ratio code segment for generating an anti-shrink to delta creep amplitude ratio by subtracting the zero point ratio from a constant;

an initial creep amplitude code segment for determining an initial creep amplitude of the tensilized tape;

a final creep amplitude code segment for determining a final creep amplitude of the tensilized tape;

a delta creep amplitude code segment for generating a delta creep amplitude by subtracting the initial creep amplitude from the final creep amplitude; and

an anti-shrink performance metric code segment for generating the anti-shrink performance metric by multiplying the anti-shrink to delta creep amplitude ratio by the delta creep amplitude.

19. The computer-readable medium of claim 18 wherein the constant is substantially 0.5.

20. The computer-readable medium of claim 18 further comprising:

an anti-shrink code segment for determining an anti-shrink value of the tensilized tape; and

a quality rating code segment for generating a quality rating for the tensilized tape based at least in part on the anti-shrink value and the anti-shrink performance metric.