Tamper-proof electronic packages formed with stressed glass

• US 10,257,924 B2
• Filed: 12/05/2017
• Issued: 04/09/2019
• Est. Priority Date: 05/13/2016
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Busby, James A., Dragone, Silvio, Fisher, Michael J., Gaynes, Michael A., Long, David C., Rodbell, Kenneth P., Santiago-Fernandez, William, Weiss, Thomas
• Primary Examiner(s): Noori, Max H
• Application Number:
  US15/831,534
• Publication Number:
  US 20180098424A1
• Time in Patent Office: 490 Days
• Field of Search: 73800
• CPC Class Codes: G06F 21/87 by means of encapsulation, e.g. for integrated circuits
• CPC Class Codes: H05K 1/0275 Security details, e.g. tampering prevention or detection
• CPC Class Codes: H05K 1/181 associated with surface mounted components
• CPC Class Codes: H05K 1/185 Components encapsulated in the insulating substrate of the printed circuit or incorporated in internal layers of a multilayer circuit semiconductor chips encapsulated by interconnect and support structures H01L23/5389, H01L24/00
• CPC Class Codes: H05K 2201/10151 Sensor
• CPC Class Codes: H05K 2201/10371 Shields or metal cases
• CPC Class Codes: H05K 5/0208 Interlock mechanisms; Means for avoiding unauthorised use or function, e.g. tamperproof

Abstract

Tamper-proof electronic packages and fabrication methods are provided which include a glass enclosure enclosing, at least in part, at least one electronic component within a secure volume, and a tamper-respondent detector. The glass enclosure includes stressed glass with a compressively-stressed surface layer, and the tamper-respondent detector monitors, at least in part, the stressed glass to facilitate defining the secure volume. The stressed glass fragments with an attempted intrusion event through the stressed glass, and the tamper-respondent detector detects the fragmenting of the stressed glass. In certain embodiments, the stressed glass may be a machined glass enclosure that has undergone ion-exchange processing, and the compressively-stressed surface layer of the stressed glass may be compressively-stressed to ensure that the stressed glass fragments into glass particles of fragmentation size less than 1000 μm with the intrusion event.

Claims

1. A tamper-proof electronic package comprising:

a glass enclosure enclosing, at least in part, at least one electronic component within a secure volume, the glass enclosure being a multi-sided glass enclosure comprising stressed glass with a compressively-stressed surface layer, the multi-sided glass enclosure including a first glass enclosure side and a second glass enclosure side, the second glass enclosure side extending away from the first glass enclosure side, and the first glass enclosure side and the second glass enclosure side each defining a respective side of the secure volume; and

a tamper-respondent detector monitoring, at least in part, the stressed glass to facilitate defining the secure volume, the stressed glass fragmenting with an attempted intrusion event through the stressed glass, and the tamper-respondent detector detecting the fragmenting of the stressed glass, the tamper-respondent detector monitoring structural integrity of the stressed glass via a sensor disposed on an inner surface of the stressed glass within the secure volume, the sensor fragmenting with fragmentation of the stressed glass to facilitate detection of the attempted intrusion event and erasure of confidential information stored within the secure volume.

2. The tamper-proof electronic package of claim 1, wherein the glass enclosure comprises a machined or molded glass enclosure that has undergone ion-exchange processing to provide the stressed glass with the compressively-stressed surface layer.

3. The tamper-proof electronic package of claim 1, wherein the compressively-stressed surface layer of the stressed glass is compressively-stressed to ensure that the stressed glass fragments into glass particles of fragmentation size less than 1000 μ

m with the intrusion event.

4. The tamper-proof electronic package of claim 1, wherein the stressed glass of the glass enclosure comprises a coating on the stressed glass providing opaqueness to the stressed glass.

5. The tamper-proof electronic package of claim 1, wherein the stressed glass of the glass enclosure is etched to provide opaqueness to the stressed glass.

6. The tamper-proof electronic package of claim 1, wherein the stressed glass of the glass enclosure is a monolithic glass element enclosing, at least in part, the at least one electronic component within the secure volume.

7. The tamper-proof electronic package of claim 6, wherein the monolithic glass element is the multi-sided glass structure which defines multiple sides of the secure volume.

8. The tamper-proof electronic package of claim 1, wherein the glass enclosure comprises a plurality of stressed glass elements adhesively bonded together to form the multi-sided glass enclosure, each stressed glass element comprising a respective compressively-stressed surface layer, and the plurality of stressed glass elements defining multiple sides of the secure volume.

9. The tamper-proof electronic package of claim 1, wherein the sensor comprises at least one conductor attached to or coating the inner surface of the stressed glass within the secure volume, the at least one conductor fragmenting with fragmentation of the stressed glass.

10. The tamper-proof electronic package of claim 1, wherein the sensor monitors a capacitance of the stressed glass in monitoring structural integrity of the stressed glass.

11. The tamper-proof electronic package of claim 1, wherein the sensor monitors optical reflectance of the stressed glass in monitoring structural integrity of the stressed glass.

12. The tamper-proof electronic package of claim 1, wherein the glass enclosure is an upper glass enclosure, and wherein the tamper-proof electronic package further comprises a base glass enclosure, the upper glass enclosure and the base glass enclosure being adhesively secured together to define the secure volume accommodating the at least one electronic component, and wherein the base glass enclosure also comprises stressed glass with a compressively-stressed surface layer.

13. A tamper-proof electronic package comprising:

a circuit board;

a glass enclosure mounted to the circuit board, and enclosing, at least in part, at least one electronic component within a secure volume, the glass enclosure being a multi-sided glass enclosure comprising stressed glass with a compressively-stressed surface layer, the multi-sided glass enclosure including a first glass enclosure side and a second glass enclosure side, the second glass enclosure side extending away from the first glass enclosure side, and the first glass enclosure side and the second glass enclosure side each defining a respective side of the secure volume;

a tamper-respondent detector monitoring, at least in part, the stressed glass to facilitate defining the secure volume, the stressed glass fragmenting with an attempted intrusion event through the stressed glass, and the tamper-respondent detector detecting the fragmenting of the stressed glass, the tamper-respondent detector monitoring structural integrity of the stressed glass via a sensor on an inner surface of the stressed glass within the secure volume, the sensor fragmenting with fragmentation of the stressed glass to facilitate detection of the attempted intrusion event and erasure of confidential information stored within the secure volume; and

an embedded tamper-respondent sensor within the circuit board, the embedded tamper-respondent sensor further facilitating defining, at least in part, the secure volume.

14. The tamper-proof electronic package of claim 13, wherein the glass enclosure comprises a machined or molded glass enclosure that has undergone ion-exchange processing to provide the stressed glass with the compressively-stressed surface layer, and wherein the compressively-stressed surface layer of the stressed glass is compressively-stressed to ensure that the stressed glass fragments into glass particles of fragmentation size less than 1000 μ

m with the intrusion event.

15. The tamper-proof electronic package of claim 13, wherein the stressed glass of the glass enclosure is a monolithic glass element enclosing, at least in part, the at least one electronic component within the secure volume, the monolithic glass element being a multi-sided glass structure defining multiple sides of the secure volume.

16. The tamper-proof electronic package of claim 13, wherein the glass enclosure comprises a plurality of stressed glass elements adhesively bonded together to form the multi-sided glass enclosure, each stressed glass element comprising a respective compressively-stressed surface layer, and the plurality of stressed glass elements defining multiple sides of the secure volume.

17. A fabrication method comprising:

fabricating a tamper-proof electronic package, the fabricating comprising;

providing a glass enclosure enclosing, at least in part, at least one electronic component within a secure volume, the glass enclosure being a multi-sided glass enclosure comprising stressed glass with a compressively-stressed surface layer, the multi-sided glass enclosure including a first glass enclosure side and a second glass enclosure side, the second glass enclosure side extending away from the first glass enclosure side, and the first glass enclosure side and the second glass enclosure side each defining a respective side of the secure volume; and

providing a tamper-respondent detector monitoring, at least in part, the stressed glass to facilitate defining the secure volume, the stressed glass fragmenting with an attempted intrusion event through the stressed glass, and the tamper-respondent detector detecting the fragmenting of the stressed glass, the tamper-respondent detector monitoring structural integrity of the stressed glass via a sensor an inner surface of the stressed glass within the secure volume, the sensor fragmenting with fragmentation of the stressed glass to facilitate detection of the attempted intrusion event and erasure of confidential information stored within the secure volume.

18. The fabrication method of claim 17, wherein providing the glass enclosure comprises providing the stressed glass with the compressively-stressed surface layer by machining or molding a glass substrate to a desired configuration, and then ion-exchange processing the glass substrate.

19. The fabrication method of claim 18, wherein the compressively-stressed surface layer of the stressed glass is compressively-stressed to ensure that the stressed glass fragments into glass particles of fragmentation size less than 1000 μ

m with the intrusion event.