Patent US5390142A successfully refreshed from Google Patents.
US5390142A
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Memory material and method for its manufacture
Assignee: Kappa Numerics Inc
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Filing: 1992-05-26
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Granted: 1995-02-14
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Expires: 2012-05-26
Abstract
Abstract A composition of materials having ferromagnetic, piezoelectric, and electro-optical properties is disclosed. In the preferred embodiment, the composition of materials comprises a first layer of Pb.sub.(1-x-y) Cd x Si y , a second layer of Se.sub.(1-z) S z , and a third layer of Fe.sub.(1-w) Cr w , where x, y, z and w are values within the ranges of 0.09≦x≦0.11, 0.09≦y≦0.11, 0.09≦x≦0.11 and 0.18≦w≦0.30. Additionally, each of the layers contain at least one of the elements of Ag, Bi, O, and N. A random-accessible, non-volatile memory built using the invented composition of materials is also disclosed. This memory provides for storing two independent bits of binary information in a single memory cell. Each cell comprises two orthogonal address lines formed on the opposite surface of a Si substrate, a composition of materials of the present invention formed over each of the address lines, and an electrode formed over each composition of materials. The data is stored electromagnetically and retrieved as a piezoelectric voltage.
Inventors
- 👤 Shimon Gendlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:33
CPC Classifications
H; H01; H01F; H01F10/00; H01F10/08; H01F10/10; H01F10/12; B; B82; B82Y; B82Y25/00; G; G11; G11C; G11C11/00; G11C11/02; G11C11/14; G11C11/15; G11C11/16; G11C11/161; H01F10/32; H10; H10D; H10D1/00; H10D1/60; H10D1/68; Y; Y10; Y10S; Y10S428/00; Y10S428/90
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
107 words
A composition of materials comprising: a first layer of material having a composition of M.sub.(1-x-y) Cd x R y where M is an element selected from the group consisting of Pb, Zn, and Te, and R is an element selected from the group consisting of Si and Ge, wherein x and y are values within the ranges of 0≦x≦1, 0≦y≦1, and 0≦(x+y)≦1; a second layer of Se.sub.(1-z) S z formed on the first layer, wherein z is a value within the range of 0≦z≦1; and a third layer of Fe.sub.(1-w) Cr w formed on the second layer, wherein w is a value within the range of 0≦w≦1.
Claim 2
Dependent Claim
107 words
A composition of materials comprising: a first layer of material having a composition of M.sub.(1-x-y) Cd x R y where M is an element selected from the group consisting of Pb, Zn, and Te, and R is an element selected from the group consisting of Si and Ge, wherein x and y are values within the ranges of 0≦x≦1, 0≦y≦1, and 0≦(x+y)≦1; a second layer of Se.sub.(1-z) S z formed on the first layer, wherein z is a value within the range of 0≦z≦1; and a third layer of Fe.sub.(1-w) Cr w formed on the second layer, wherein w is a value within the range of 0≦w≦1.
Claim 3
Dependent Claim
37 words
The composition of materials of claim 1 wherein the first layer further includes at least one of the following elements: Bi, O, N, and an element selected from the group consisting of Ag, Au, Pt, and Cu.
Claim 4
Dependent Claim
37 words
The composition of materials of claim 2 wherein the second layer further includes at least one of the following elements: Bi, O, N, and an element selected from the group consisting of Ag, Au, Pt and Cu.
Claim 5
Dependent Claim
37 words
The composition of materials of claim 3 wherein the third layer further includes at least one of the following elements: Bi, O, N, and an element selected from the group consisting of Ag, Au, Pt, and Cu.
Claim 6
Dependent Claim
18 words
The composition of materials of claim 1 wherein the value of x is within the range of 0.09≦x≦0.11.
Claim 7
Dependent Claim
18 words
The composition of materials of claim 5 wherein the value of y is within the range of 0.09≦y≦0.11.
Claim 8
Dependent Claim
18 words
The composition of materials of claim 6 wherein the value of z is within the range of 0.09≦z≦0.11.
Claim 9
Dependent Claim
18 words
The composition of materials of claim 7 wherein the value of w is within the range of 0.18≦w≦0.30.
Claim 10
Dependent Claim
18 words
The composition of materials of claim 8 wherein the value of w is within the range of 0.22≦w≦0.26.
Claim 11
Dependent Claim
15 words
The composition of materials of claim 1 wherein the value of x is substantially 0.10.
Claim 12
Dependent Claim
15 words
The composition of materials of claim 10 wherein the value of y is substantially 0.10.
Claim 13
Dependent Claim
15 words
The composition of materials of claim 11 wherein the value of z is substantially 0.10.
Claim 14
Dependent Claim
15 words
The composition of materials of claim 12 wherein the value of w is substantially 0.24.
Claim 15
Dependent Claim
16 words
The composition of materials of claim 13 wherein the first layer is substantially 0.5 μm thick.
Claim 16
Dependent Claim
16 words
The composition of materials of claim 14 wherein the second layer is substantially 0.5 μm thick.
Claim 17
Dependent Claim
16 words
The composition of materials of claim 15 wherein the third layer is substantially 0.5 μm thick.
Claim 18
Independent Claim
118 words
A method of manufacturing a composition of materials having ferromagnetic, electro-optic and piezoelectric properties comprising the steps of: forming a first layer of material having a composition of M.sub.(1-x-y) Cd x R y where M is an element selected from the group consisting of Pb, Zn, and Te, and R is an element selected from the group consisting of Si and Ge, wherein x and y are values within the ranges of 0≦x≦1, 0≦y≦1, and 0≦(x+y)≦1; forming a second layer of Se.sub.(1-z) S z on the first layer, wherein z is a value within the range of 0≦z≦1; and forming a third layer of Fe.sub.(1-w) Cr w on the second layer, wherein w is a value of 0≦w≦1.
Claim 19
Independent Claim
118 words
A method of manufacturing a composition of materials having ferromagnetic, electro-optic and piezoelectric properties comprising the steps of: forming a first layer of material having a composition of M.sub.(1-x-y) Cd x R y where M is an element selected from the group consisting of Pb, Zn, and Te, and R is an element selected from the group consisting of Si and Ge, wherein x and y are values within the ranges of 0≦x≦1, 0≦y≦1, and 0≦(x+y)≦1; forming a second layer of Se.sub.(1-z) S z on the first layer, wherein z is a value within the range of 0≦z≦1; and forming a third layer of Fe.sub.(1-w) Cr w on the second layer, wherein w is a value of 0≦w≦1.
Claim 20
Dependent Claim
42 words
The method of claim 17 further comprising the step of adding at least one of the elements of Bi, O, N, and an element selected from the group consisting of Ag, Au, Pt, and Cu, into the first, second, and third layers.
Claim 21
Dependent Claim
30 words
The method of claim 17 further comprising the step of adding at least one of the elements of Bi, O, N, or Ag, into the first, second, and third layers.
Claim 22
Dependent Claim
42 words
The method of claim 19 wherein the step of adding at least one of the elements of Bi, O, N, Ag comprises immersing the composition of materials in an electrolyte containing Bi 2 O 3 and AgNO 3 and performing an electrolysis.
Claim 23
Dependent Claim
14 words
The method of claim 20 wherein the electrolyte is saturated with AgNO 3 .
Claim 24
Dependent Claim
14 words
The method of claim 20 further comprising the step of continuously stirring the electrolyte.
Claim 25
Dependent Claim
13 words
The method of claim 22 further comprising the step of heating the electrolyte.
Claim 26
Dependent Claim
17 words
The method of claim 23 further comprising the step of maintaining the electrolyte at substantially 97° C.
Claim 27
Dependent Claim
25 words
The method of claim 20 further comprising the steps of applying a negative electrical potential to the composition of materials with respect to the electrolyte.
Claim 28
Dependent Claim
27 words
The method of claim 20 further comprising the steps of alternatively applying positive and negative electrical potentials to the composition of materials with respect to the electrolyte.
Claim 29
Dependent Claim
30 words
The method of claim 26 wherein, in a 24 hour interval, the negative potential is applied for substantially 14 hours and the positive potential is applied for substantially 10 hours.
Claim 30
Dependent Claim
14 words
The method of claim 20 wherein the electrolysis is performed for substantially 45 days.
Claim 31
Dependent Claim
16 words
The method of claim 17 wherein the value of x is within the ranges of 0.09≦x≦0.11.
Claim 32
Dependent Claim
16 words
The method of claim 29 wherein the value of y is within the ranges of 0.09≦y≦0.11.
Claim 33
Dependent Claim
16 words
The method of claim 30 wherein the value of z is within the ranges of 0.09≦z≦0.11.
Claim 34
Dependent Claim
16 words
The method of claim 31 wherein the value of w is within the ranges of 0.22≦w≦0.26.
Claim 35
Dependent Claim
13 words
The method of claim 17 wherein the value of x is substantially 0.10.
Claim 36
Dependent Claim
13 words
The method of claim 33 wherein the value of y is substantially 0.10.
Claim 37
Dependent Claim
13 words
The method of claim 34 wherein the value of z is substantially 0.10.
Claim 38
Dependent Claim
13 words
The method of claim 35 wherein the value of w is substantially 0.24.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1998-02-13 | 1998-08-15 | 1999-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-13 | 2002-08-15 | 2003-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-13 | 2006-08-15 | 2007-02-14 | $7700.00 | Window Closed / Lapsed |