Granted Patent B2

US 12,250,892 · App. 18/678,092 · Granted Mar 11, 2025

Inventors: Peiman Hosseini (Bicester, GB); Clement Talagrand (Oxford, GB); Graham Triggs (Oxford, GB); Christopher Wright (Exmouth, GB); Noboru Yamada (Osaka, JP)

Assignee: E Ink Corporation

H10N70/8828G02F1/0054G02F1/009G02F1/0147H10N70/235

Abstract

Claims (35)

1. A phase change material for use in a display device, wherein said phase change material is selected from:

Sb 31.91 G 40.07 Te 28.03 ;

Sb 35.8 Ge 34.91 Te 29.28 ;

Sb 11.72 G 56.57 Te 31.71 ;

Sb 22.26 Ge 47.06 Te 30.68 ;

Sb 46.96 Ge 24.95 Te 28.09 ;

Sb 22.8 Ge 47.82 Te 29.38 ;

Sb 44.34 Ge 27.5 Te 28.16 ;

Sb 45.54 Ge 24.96 Te 29.46 ;

Sb 41.45 Ge 27.93 Te 30.62 ;

Sb 50.51 Ge 20.3 Te 29.19 ;

Sb 51.96 Ge 22.01 Te 26.03 ;

Sb 33.78 Ge 44.23 Te 21.98 ;

Sb 54.49 Ge 23.97 Te 21.54 ;

Sb 49.8 Ge 27.68 Te 22.52 ;

Sb 48.8 Ge 29.98 Te 21.52 ;

Sb 66.3 Ge 16.2 Te 17.5 ;

Sb 49.67 Ge 20.43 Te 29.9 ;

Sb 45.57 Ge 24.96 Te 29.46 ;

Sb 38.68 Ge 28.41 Te 32.92 ;

Sb 38.37 Ge 30.62 Te 31.02 ;

Sb 36.15 Ge 30.89 Te 32.96 ;

Sb 34.27 Ge 34.99 Te 30.74 ;

Sb 33.79 Ge 41.06 Te 25.15 ;

Sb 24.63 Ge 42.71 Te 32.66 ;

Se 51 Te 21 Sn 28 ;

Ge 8 Sn 5 Te 87 ; and

Te 80 Sn 15 Ge 5 , and

wherein said phase change material has a recrystallization temperature of at most about 250° C. and a recrystallization time of at least about 1 μs.

2. The phase change material of claim 1 , wherein said phase change material has a recrystallization temperature of at most about 200° C. and/or a recrystallization time of at least about 2 μs.

3. The phase change material of claim 1 , wherein said phase change material has a recrystallization temperature of at least about 70° C. and/or a recrystallization time of at most about 100 μs.

4. The phase change material of claim 1 , wherein said phase change material has a melting point of at most about 500° C.

5. The phase change material of claim 1 , wherein said phase change material has a cyclability corresponding to at least 99% contrast remaining relative to the initial contrast after 1000 crystallisation/amorphisation cycles.

6. The phase change material of claim 1 , wherein said phase change material comprises in total at most about 10 at % (atomic percentage)-of one or more dopants.

7. The phase change material of claim 1 , wherein said dopants comprise one or more of carbon, oxygen, nitrogen, bismuth, gold, germanium, tin, tellurium, selenium, sulphur, and when the phase change material comprises or consists of germanium, tin and tellurium gold.

Assignments (2)

Priority Claims (1)

Continuity (2)

References Cited (20)