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US5512162A
Expired / Lapsed
US
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Method for photo-forming small shaped metal containing articles from porous precursors
Assignee: Massachusetts Institute of Technology
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Filing: 1992-08-13
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Granted: 1996-04-30
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Expires: 2012-08-13
Abstract
Abstract The invention is a method for making a metal containing article, comprising the steps of: providing a layer of a porous ground in a selected area; exposing selected regions of the layer of porous ground to light, thereby metallizing the selected regions; repeating the foregoing steps a selected number of times to produce a selected number of layers; and selectively modifying the metallized regions of the layers. The initial metallization can be by electroless or semiconductor photo deposition plating. The subsequent modification of the metallized regions can be by electroless plating, electroplating or sintering. It is also possible, in some instances, to forego the second phase modification, the initial phase having provided the desired parameters. In a third preferred embodiment, the invention is a method using an initial metallization phase effected by exposure of a metal salt, such as a metal halide, to light, thereby inducing activation of the halide. A subsequent metallization step is conducted, as well as subsequent modification according to any of the methods mentioned above. A continuous embodiment of the invention is also disclosed, where a continuously deposited bed of powder particles is exposed to light and metallized. Subsequently, the metallized regions are further modified as above. An apparatus for the practice of the continuous methods is also proposed. ?
Inventors
- 👤 Emanuel Sachs
- 👤 Che-Chih Tsao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:09
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/02; C23C18/06; B; B33; B33Y; B33Y10/00; B33Y70/00; C23C18/14; C23C18/143; C23C18/16; C23C18/1601; C23C18/1603; C23C18/1607; C23C18/161; C23C18/1612; C23C18/1619; C23C18/1633; C23C18/1646; C23C18/165; C23C18/1651; C25; C25D; C25D1/00; C25D1/003; G; G03; G03C; G03C5/00; G03C5/58; B22; B22F; B22F12/00; B22F12/40; B22F12/44; B22F12/60; B22F12/67; H; H05; H05K; H05K3/00; H05K3/10; H05K3/18; H05K3/181; H05K3/182; H05K3/185; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
84 words
A method for making a metal-containing article, comprising the steps of: a. providing a layer of a porous ground on a selected area of a base substantially immersed within a fluid that contains a metal source; b. exposing selected regions of said layer of porous ground to light, thereby metallizing said selected regions; c. repeating steps (a) and (b) a selected number of times to produce a selected number of layers; and d. joining said metallized regions of at least two of said layers.
Claim 2
Independent Claim
84 words
A method for making a metal-containing article, comprising the steps of: a. providing a layer of a porous ground on a selected area of a base substantially immersed within a fluid that contains a metal source; b. exposing selected regions of said layer of porous ground to light, thereby metallizing said selected regions; c. repeating steps (a) and (b) a selected number of times to produce a selected number of layers; and d. joining said metallized regions of at least two of said layers.
Claim 3
Dependent Claim
19 words
The method of claim 1, said porous ground comprising a powder of metal coated with an electrically non-conducting material.
Claim 4
Dependent Claim
25 words
The method of claim 1, further comprising the step of detaching from said metallized regions selected regions of said ground that have not been metallized.
Claim 5
Dependent Claim
22 words
The method of claim 1, further comprising the step of further transforming selected regions of said ground that have not been metallized.
Claim 6
Dependent Claim
22 words
The method of claim 4, said step of further transforming comprising the step of impregnating said unmetallized ground with a structural composition.
Claim 7
Dependent Claim
17 words
The method of claim 1, said metallizing step comprising the step of electroless plating said selected regions.
Claim 8
Dependent Claim
15 words
The method of claim 6, said step of joining said metallized regions comprising electroless plating.
Claim 9
Dependent Claim
14 words
The method of claim 6, said step of joining said metallized regions comprising electroplating.
Claim 10
Dependent Claim
14 words
The method of claim 6, said step of joining said metallized regions comprising sintering.
Claim 11
Dependent Claim
19 words
The method of claim 1, said metallizing step comprising the step of light induced semiconductor plating said selected regions.
Claim 12
Dependent Claim
15 words
The method of claim 10, said step of joining said metallized regions comprising electroless plating.
Claim 13
Dependent Claim
14 words
The method of claim 10, said step of joining said metallized regions comprising electroplating.
Claim 14
Dependent Claim
14 words
The method of claim 10, said step of joining said metallized regions comprising sintering.
Claim 15
Independent Claim
106 words
A method for making a metal-containing article comprising the steps of: a. providing a layer of a porous ground on a selected area of a base; b. contacting said porous ground with an electroless plating solution; c. exposing selected regions of said layer of porous ground to light, thereby metallizing said selected regions; d. repeating steps (a) and (b) and (c) a selected number of times, each successive layer provided adjacent a layer that has already been formed, to produce a selected number of metallized layers, said metallization adding metal within said metallized regions of each individual layer and between said metallized regions of adjacent layers.
Claim 16
Independent Claim
106 words
A method for making a metal-containing article comprising the steps of: a. providing a layer of a porous ground on a selected area of a base; b. contacting said porous ground with an electroless plating solution; c. exposing selected regions of said layer of porous ground to light, thereby metallizing said selected regions; d. repeating steps (a) and (b) and (c) a selected number of times, each successive layer provided adjacent a layer that has already been formed, to produce a selected number of metallized layers, said metallization adding metal within said metallized regions of each individual layer and between said metallized regions of adjacent layers.
Claim 17
Dependent Claim
23 words
The method of claim 14, said electroless plating solution comprising a metal selected from the group consisting of: copper, nickel, cobalt and palladium.
Claim 18
Independent Claim
81 words
A method for making a metal-containing article, comprising the steps of: a. providing a layer of a porous, metal salt-containing ground on a selected area of a base; b. exposing selected regions of said layer of porous ground to light, thereby activating said selected regions; c. repeating steps (a) and (b) a selected number of times to produce a selected number of layers; d. metallizing said activated regions; and e. joining said metallized regions of at least two of said layers.
Claim 19
Independent Claim
81 words
A method for making a metal-containing article, comprising the steps of: a. providing a layer of a porous, metal salt-containing ground on a selected area of a base; b. exposing selected regions of said layer of porous ground to light, thereby activating said selected regions; c. repeating steps (a) and (b) a selected number of times to produce a selected number of layers; d. metallizing said activated regions; and e. joining said metallized regions of at least two of said layers.
Claim 20
Dependent Claim
35 words
The method of claim 16, said step of joining said metallized regions comprising the step of electroless plating additional metal within said metallized regions of individual layers and between said metallized regions of adjacent layers.
Claim 21
Dependent Claim
34 words
The method of claim 16, said step of joining said metallized regions comprising the step of electroplating additional metal within said metallized regions of individual layers and between said metallized regions of adjacent layers.
Claim 22
Dependent Claim
33 words
The method of claim 16, said step of joining said metallized regions comprising the step of sintering metal within said metallized regions of individual layers and between said metallized regions of adjacent layers.
Claim 23
Dependent Claim
15 words
The method of claim 16, said ground comprising a ceramic coated with a metal halide.
Claim 24
Dependent Claim
16 words
The method of claim 16, said ground comprising a polymeric sheet coated with a metal halide.
Claim 25
Independent Claim
79 words
A method for making a metal-containing article, comprising the steps of: a. providing porous ground on a selected area of a base substantially immersed within a fluid that contains a metal source; b. while the providing of step (a) is continuing, exposing selected regions of said porous ground to light, thereby metallizing said selected regions to a selected degree and to a preselected depth; and c. joining said metallized regions of porous ground that are adjacent to each other.
Claim 26
Independent Claim
79 words
A method for making a metal-containing article, comprising the steps of: a. providing porous ground on a selected area of a base substantially immersed within a fluid that contains a metal source; b. while the providing of step (a) is continuing, exposing selected regions of said porous ground to light, thereby metallizing said selected regions to a selected degree and to a preselected depth; and c. joining said metallized regions of porous ground that are adjacent to each other.
Claim 27
Dependent Claim
13 words
The method of claim 22, said metallizing comprising the step of electroless plating.
Claim 28
Dependent Claim
13 words
The method of claim 22, said metallizing comprising the step of semiconductor plating.
Claim 29
Dependent Claim
28 words
The method of claim 22, said step of joining said metallized regions comprising the step of electroless plating additional metal within said metallized selected volume of porous ground.
Claim 30
Dependent Claim
24 words
The method of claim 22, said step of joining said metallized regions comprising the step of electroplating additional metal within said metallized porous ground.
Claim 31
Dependent Claim
23 words
The method of claim 22, said step of joining said metallized regions comprising the step of sintering within said metallized of porous ground.
Claim 32
Independent Claim
64 words
A method for making a metal-containing article, comprising the steps of: a. providing porous ground on a selected area of a base; b. contacting said porous ground with an electroless plating solution; c. while the providing of step (a) is continuing, exposing selected regions of said porous ground to light, thereby metallizing said selected regions to a preselected degree and to a preselected depth.
Claim 33
Independent Claim
64 words
A method for making a metal-containing article, comprising the steps of: a. providing porous ground on a selected area of a base; b. contacting said porous ground with an electroless plating solution; c. while the providing of step (a) is continuing, exposing selected regions of said porous ground to light, thereby metallizing said selected regions to a preselected degree and to a preselected depth.
Claim 34
Independent Claim
77 words
A method for making a metal-containing article, comprising the steps of: a. providing porous metal salt ground on a selected area of a base; b. while the providing of step (a) is continuing, exposing selected regions of said porous ground to light, thereby activating said selected regions to a preselected degree and to a preselected depth; c. metallizing the selectively activated regions and d. joining said metallized regions of porous ground that are adjacent to each other.
Claim 35
Independent Claim
77 words
A method for making a metal-containing article, comprising the steps of: a. providing porous metal salt ground on a selected area of a base; b. while the providing of step (a) is continuing, exposing selected regions of said porous ground to light, thereby activating said selected regions to a preselected degree and to a preselected depth; c. metallizing the selectively activated regions and d. joining said metallized regions of porous ground that are adjacent to each other.
Claim 36
Dependent Claim
25 words
The method of claim 29, said step of joining said metallized regions comprising the step of electroless plating additional metal within said metallized porous ground.
Claim 37
Dependent Claim
25 words
The method of claim 29, said step of joining said metallized regions comprising the step of electro plating additional metal within said metallized porous ground.
Claim 38
Dependent Claim
22 words
The method of claim 29, said step of joining said metallized regions comprising the step of sintering within said metallized porous ground.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1999-04-30 | 1999-10-30 | 2000-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-30 | 2003-10-30 | 2004-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-30 | 2007-10-30 | 2008-04-30 | $7700.00 | Window Closed / Lapsed |