1. A flash interface error injector for end-of-life testing of a flash-based array, the error injector comprising:
a bit flip probability logic, implemented by one or more bit flip probability processors, configured to identify one or more bits to be flipped; and
a plurality of error injection logic blocks, implemented by one or more error injection processors, configured to inject errors in the one or more bits identified by the bit flip probability logic, each of the plurality of error injection logic blocks corresponding with a respective flash channel of the flash-based array.
2. The error injector according to claim 1, wherein the plurality of error injection logic blocks include a digital logic gate implementing an exclusive or (XOR).
3. The error injector according to claim 1, wherein the bit flip probability logic identifies the one or more bits by page number and block number to affect a hard injection.
4. The error injector according to claim 1, wherein the bit flip probability logic generates the one or more bits to be flipped as a deterministic or random pattern.
5. The error injector according to claim 1, wherein the bit flip probability logic generates the one or more bits to be flipped as a weighted pseudo-random pattern.
6. The error injector according to claim 5, wherein the weighted pseudo-random pattern is given by a particular density and a particular distribution of bit flips for a given number of bits.
7. The error injector according to claim 5, wherein a probability of a bit flip in the weighted pseudo-random pattern is based on accelerating factors.
8. The error injector according to claim 7, wherein the accelerating factors include acceleration based on a disturbance created by programming or reading an adjacent page.
9. The error injector according to claim 7, wherein the accelerating factors include acceleration based on program-erase cycling.
10. The error injector according to claim 7, wherein the accelerating factors include acceleration based on retaining data.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A tempered glass sheet comprising a residual compressive stress layer formed at a surface of the glass sheet and a residual tensile stress layer formed inside the glass sheet to increase strength of the glass sheet by a balance of residual stresses in these layers,
wherein the tempered glass sheet has in its front view a peripheral region including its periphery and a central region occupying an inside of the peripheral region, and an average surface compressive stress in the central region is larger than an average surface compressive stress in the peripheral region, and
wherein the average surface compressive stress is at least 90 MPa in the peripheral region of the tempered glass sheet.
2. The tempered glass sheet according to claim 1, wherein a thickness of the tempered glass sheet is at most 2.8 mm, the average surface compressive stress in the central region is at least 100 MPa, and the average surface compressive stress in the peripheral region is at least 90 MPa.
3. The tempered glass sheet according to claim 1,
wherein a border between the central region and the peripheral region is defined by lines connecting points where tips of cracks propagating from a gravity point towards the peripheral region when the tempered glass sheet is fragmented at the gravity point, meet elastic waves generated at a same time with the cracks, propagated at a speed of 1.7 to 2.3 times as much as a speed of the cracks and reflected regularly at the periphery of the tempered glass sheet.
4. The tempered glass sheet according to claim 3, wherein the average surface compressive stress in the central region is from 8 to 47% larger than the average surface compressive stress in the peripheral region.
5. The tempered glass sheet according to claim 1, wherein the average surface compressive stress in the central region is from 8 to 47% larger than the average surface compressive stress in the peripheral region.
6. The tempered glass sheet according to claim 5,
wherein a thickness of the tempered glass sheet is at most 2.8 mm, the average surface compressive stress in the central region is at least 100 MPa, and the average surface compressive stress in the peripheral region is at least 90 MPa.
7. A tempered glass sheet comprising a residual compressive stress layer formed at a surface of the glass sheet and a residual tensile stress layer formed inside the glass sheet to increase strength of the glass sheet by a balance of residual stresses in these layers,
wherein the tempered glass sheet has in its front view a peripheral region including its periphery and a central region occupying an inside of the peripheral region, and an average surface compressive stress in the central region is larger than an average surface compressive stress in the peripheral region, and
wherein a thickness of the tempered glass sheet is at most 2.8 mm, the average surface compressive stress in the central region is at least 100 MPa, and the average surface compressive stress in the peripheral region is at least 90 MPa.
8. The tempered glass sheet according to claim 7, wherein the average surface compressive stress in the central region is from 8 to 47% larger than the average surface compressive stress in the peripheral region.
9. The tempered glass sheet according to claim 7,
wherein a border between the central region and the peripheral region is defined by lines connecting points where tips of cracks propagating from a gravity point towards the peripheral region when the tempered glass sheet is fragmented at the gravity point, meet elastic waves generated at a same time with the cracks, propagated at a speed of 1.7 to 2.3 times as much as a speed of the cracks and reflected regularly at the periphery of the tempered glass sheet.
10. The tempered glass sheet according to claim 9, wherein the average surface compressive stress in the central region is from 8 to 47% larger than the average surface compressive stress in the peripheral region.