TRANSFER PRINTING USING SHAPE MEMORY POLYMERS
원문보기
IPC분류정보
국가/구분
United States(US) Patent
공개
국제특허분류(IPC7판)
C08J-007/04
B05C-001/02
B81C-001/00
B41J-002/475
B05D-001/26
출원번호
US-0657487
(2017-07-24)
공개번호
US-0100046
(2018-04-12)
발명자
/ 주소
Kim, Seok
Eisenhaure, Jeffrey D.
출원인 / 주소
Kim, Seok
인용정보
피인용 횟수 :
0인용 특허 :
0
초록▼
A method of transfer printing comprises globally heating an array of stamps, where each stamp comprises a shape memory polymer with a light absorbing agent dispersed therein, and pressing the array of stamps to a donor substrate comprising a plurality of inks. Each stamp is thereby compressed from a
A method of transfer printing comprises globally heating an array of stamps, where each stamp comprises a shape memory polymer with a light absorbing agent dispersed therein, and pressing the array of stamps to a donor substrate comprising a plurality of inks. Each stamp is thereby compressed from an undeformed adhesion-off configuration to a deformed adhesion-on configuration. The array of stamps is then cooled to rigidize the shape memory polymer and bind the plurality of inks to the stamps in the deformed adhesion-on configuration. The plurality of inks remain bound to the stamps while the array of stamps is positioned in proximity with a receiving substrate. A selected stamp in the array is then locally heated using a concentrated light source. The selected stamp returns to the undeformed adhesion-off configuration, and the ink bound to the selected stamp is released and transfer printed onto the receiving substrate.
대표청구항▼
1. A method of transfer printing on a receiving substrate, the method comprising: globally heating an array of stamps, each stamp in the array comprising a shape memory polymer having a light absorbing agent dispersed therein;pressing the array of stamps to a donor substrate comprising a plurality o
1. A method of transfer printing on a receiving substrate, the method comprising: globally heating an array of stamps, each stamp in the array comprising a shape memory polymer having a light absorbing agent dispersed therein;pressing the array of stamps to a donor substrate comprising a plurality of inks, thereby compressing each stamp from an undeformed adhesion-off configuration to a deformed adhesion-on configuration;cooling the array of stamps, thereby rigidizing the shape memory polymer and binding the plurality of inks to the stamps in the deformed adhesion-on configuration;positioning the array of stamps in proximity with a receiving substrate, the plurality of inks remaining bound to the stamps during the positioning; andafter the positioning, locally heating a selected stamp in the array using a concentrated light source, the selected stamp returning to the undeformed adhesion-off configuration and the ink bound to the selected stamp being released and transfer printed onto the receiving substrate. 2. The method of claim 1, wherein globally heating the array of stamps comprises heating the array to at least a glass transition Tg of the shape memory polymer, wherein cooling the array of stamps comprises cooling the array below the glass transition temperature Tg of the shape memory polymer, andwherein locally heating the selected stamp in the array comprises locally heating the selected stamp to at least the glass transition temperature Tg of the shape memory polymer. 3. The method of claim 1, wherein the concentrated light source comprises a laser, and wherein locally heating the selected stamp in the array comprises illuminating the selected stamp with near-infrared radiation. 4. The method of claim 1, wherein light from the concentrated light source is absorbed by the light absorbing agent dispersed in the shape memory polymer, thereby effecting the local heating of the selected stamp, and wherein the selected stamp is locally heated to a temperature in a range from about 60° C. to about 120° C. 5. The method of claim 1, wherein the stamps in the array other than the selected stamp remain in the deformed adhesion-on configuration during the local heating. 6. The method of claim 1, further comprising rastering the concentrated light source to locally heat more than one stamp in the array, there being a plurality of the selected stamps. 7. The method of claim 1, wherein the concentrated light source is disposed behind the array of stamps, the shape memory polymer being light-transmissive. 8. The method of claim 1, wherein a spacing of the stamps in the array is at least as large as a spot size of the concentrated light source. 9. The method of claim 1, wherein globally heating the array of stamps comprises resistive heating. 10. The method of claim 1, wherein the inks comprise a material selected from the group consisting of: semiconductor, metal, carbon, colloid, organic material, and biological material, and wherein the light absorbing agent is selected from the group consisting of: carbon black, carbon fibers, organic and inorganic absorption pigments, and dyes. 11. The method of claim 1, wherein each stamp includes a plurality of raised surface features, and wherein the light absorbing agent is localized to the raised surface features. 12. A stamp array for transfer printing, the stamp array comprising: an array of stamps, each stamp in the array comprising a shape memory polymer including a light absorbing agent dispersed therein. 13. The stamp array of claim 12, wherein the shape memory polymer has a glass transition temperature Tg in a range from about 30° C. to about 70° C. 14. The stamp array of claim 12, wherein the light absorbing agent is selected from the group consisting of: carbon black, carbon fibers, organic and inorganic absorption pigments, and dyes. 15. The stamp array of claim 12, wherein each stamp includes a plurality of raised surface features. 16. The stamp array of claim 15, wherein each of the raised surface features comprises the shape memory polymer and is integrally formed with the stamp. 17. The stamp array of claim 15, wherein the light absorbing agent is localized to the raised surface features. 18. The stamp array of claim 15, wherein an areal density of the raised surface features on each stamp is at least about 50%. 19. The stamp array of claim 12, further comprising a stamp back portion comprising the shape memory polymer and integrally formed with the stamps in the array. 20. The stamp array of claim 19, further comprising a resistive heating element attached to or embedded in the stamp back portion. 21. A method of transfer printing on a receiving substrate, the method comprising: globally heating an array of stamps, each stamp in the array comprising a shape memory polymer;pressing the array of stamps to a donor substrate comprising a plurality of inks, thereby compressing each stamp from an undeformed adhesion-off configuration to a deformed adhesion-on configuration;cooling the array of stamps, thereby rigidizing the shape memory polymer and binding the plurality of inks to the stamps in the deformed adhesion-on configuration;positioning the array of stamps in proximity with a receiving substrate, the plurality of inks remaining bound to the stamps during the positioning; andafter the positioning, locally heating a selected stamp in the array, the selected stamp returning to the undeformed adhesion-off configuration and the ink bound to the selected stamp being released and transfer printed onto the receiving substrate. 22. The method of claim 21, further comprising a light absorbing agent dispersed in the shape memory polymer, and wherein locally heating the selected stamp in the array comprises irradiating the selected stamp with light from a concentrated light source, the light being absorbed by the light absorbing agent to effect the local heating. 23. The method of claim 21, further comprising an addressable electrically conductive heating element in thermal contact with each of the stamps in the array, and wherein locally heating the selected stamp in the array comprises passing a current through the respective electrically conductive heating element. 24. The method of claim 21, wherein globally heating the array of stamps comprises resistive heating, radiant heating, or convective heating of the array.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.