US4395451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor wafer and die handling method and means
Assignee: GEL-PAK LLC
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Filing: 1980-07-14
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Granted: 1983-07-26
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Expires: 2000-07-14
Abstract
Abstract Semiconductor wafer and die handling method and means are disclosed which include use of a rigid substrate and attached compliant elastomer layer. The outer face of the elastomer layer is texturized to reduce the interfacial forces between said layer and semiconductors supported thereon sufficiently to allow for removal of the semiconductors by conventional means. Friction forces between the texturized layer and semiconductors and remaining interfacial forces are sufficiently high to prevent undesired movement of semiconductors relative to the supporting layer during handling. The elastomer layer may be bonded to the substrate, or attached thereto by interfacial forces between smooth abutting substrate and elastomer layer surfaces. Among other things, the compliant elastomer layer may be included in the construction of a shipping container for semiconductor chips, wafers, or the like. Texturization of the elastomer surface may be provided by molding using a mold with a texturized surface.
Inventors
- 👤 Victor E. Althouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:57
CPC Classifications
H; H10; H10P; H10P50/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24479; Y10T428/24612; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
116 words
A non-adhesive carrier for handling semiconductor articles having a smooth face, said carrier comprising, a rigid substrate having a flat upper face, a resilient silicone elastomeric sheet having a Shore A hardness of between 15 and to about 90 member attached to the flat upper face of the substrate, said silicone elastomeric sheet member having a flat lower surface attached to the upper flat face of said substrate and having an upper exposed texturized surface for support of semiconductor articles, the texturized upper surface being effective to substantially reduce interfacial forces between said surface and the smooth surface of a semiconductor article supported thereon so that the semiconductor article can be readily removed from said surface.
Claim 2
Dependent Claim
116 words
A non-adhesive carrier for handling semiconductor articles having a smooth face, said carrier comprising, a rigid substrate having a flat upper face, a resilient silicone elastomeric sheet having a Shore A hardness of between 15 and to about 90 member attached to the flat upper face of the substrate, said silicone elastomeric sheet member having a flat lower surface attached to the upper flat face of said substrate and having an upper exposed texturized surface for support of semiconductor articles, the texturized upper surface being effective to substantially reduce interfacial forces between said surface and the smooth surface of a semiconductor article supported thereon so that the semiconductor article can be readily removed from said surface.
Claim 3
Dependent Claim
46 words
A non-adhesive carrier as defined in claim 1 wherein said texturized surface of said silicone elastomeric sheet member is effective to frictionally resist sliding movement of semiconductor articles supported theroen even when said surface is inclined at an angle greater than 45° to a horizontal surface.
Claim 4
Dependent Claim
22 words
A non-adhesive carrier as defined in claim 1 wherein said texturized surface comprises a molded surface with texturization formed by a mold.
Claim 5
Dependent Claim
18 words
A non-adhesive carrier as defined in claim 1 wherein said texturized surface comprises a random pattern of indentations.
Claim 6
Dependent Claim
18 words
A non-adhesive carrier as defined in claim 1 wherein said texturized surface comprises a regular pattern of indentations.
Claim 7
Dependent Claim
52 words
A non-adhesive carrier as defined in claim 1 wherein said upper face of said substrate and lower face of said resilient silicone elastomeric sheet member are smooth, said resilient silicone elastomeric sheet member is attached to said substrate by non-adhesive, interfacial, forces between said smooth substrate and silicone elastomeric sheet member surfaces.
Claim 8
Dependent Claim
23 words
A non-adhesive carrier as defined in claim 1 wherein said resilient, silicone, elastomeric, sheet member is attached to said substrate by adhesive bonding.
Claim 9
Dependent Claim
104 words
A sheet material for attachment to a plane upper surface of a rigid base member for use in handling or shipping semiconductor articles which have smooth faces, said sheet material comprising, a resilient silicone elastomer having a Shore A hardness of between 15 to about 90 having one flat surface for attachment to the plane upper surface of a rigid base member and an opposite texturized outer surface for support of semiconductor articles, the texturized surface of the silicone elastomer being effective to substantially reduce interfacial forces between said surface and the smooth faces of semiconductor articles supported thereon while retaining frictional forces therebetween.
Claim 10
Dependent Claim
104 words
A sheet material for attachment to a plane upper surface of a rigid base member for use in handling or shipping semiconductor articles which have smooth faces, said sheet material comprising, a resilient silicone elastomer having a Shore A hardness of between 15 to about 90 having one flat surface for attachment to the plane upper surface of a rigid base member and an opposite texturized outer surface for support of semiconductor articles, the texturized surface of the silicone elastomer being effective to substantially reduce interfacial forces between said surface and the smooth faces of semiconductor articles supported thereon while retaining frictional forces therebetween.
Claim 11
Dependent Claim
41 words
A sheet material as defined in claim 8 wherein said texturized surface is effective to frictionally resist sliding movement of semiconductor articles supported thereon even when said surface is inclined at an angle of greater than 45° to a horizontal surface.
Claim 12
Dependent Claim
16 words
A sheet material as defined in claim 8 wherein said texturized surface comprises a mold-formed surface.
Claim 13
Dependent Claim
17 words
A sheet material as defined in claim 8 wherein said texturized surface is of a random pattern.
Claim 14
Dependent Claim
17 words
A sheet material as defined in claim 8 wherein said texturized surface is of a regular pattern.
Claim 15
Dependent Claim
32 words
A sheet material as defined in claim 8 wherein said one surface of said elastomer is smooth for attachment by interfacial vacuum forces to a smooth upper surface of a base member.
Claim 16
Dependent Claim
92 words
A non-adhesive carrier for handling semiconductor articles, which semiconductor articles have a smooth face, said carrier comprising, rigid means having a flat upper texturized surface formed of resilient silicone elastomeric material having a Shore A hardness of between 15 to about 90 for support of semiconductor articles thereon, texturization of said flat upper surface being of a degree to substantially reduce interfacial forces between said surface and the smooth surface of the semiconductor article supported thereon to facilitate removal of said article from said surface by use of conventional semiconductor handling means.
Claim 17
Dependent Claim
92 words
A non-adhesive carrier for handling semiconductor articles, which semiconductor articles have a smooth face, said carrier comprising, rigid means having a flat upper texturized surface formed of resilient silicone elastomeric material having a Shore A hardness of between 15 to about 90 for support of semiconductor articles thereon, texturization of said flat upper surface being of a degree to substantially reduce interfacial forces between said surface and the smooth surface of the semiconductor article supported thereon to facilitate removal of said article from said surface by use of conventional semiconductor handling means.
Claim 18
Dependent Claim
45 words
A non-adhesive carrier as defined in claim 14 wherein said texturized surface of said silicone elastomeric material is effective to frictionally resist sliding movement of semiconductor articles supported thereon even when said surface is inclined at an angle greater than 45° to a horizontal surface.
Claim 19
Dependent Claim
28 words
A non-adhesive carrier as defined in claim 14 wherein said rigid means comprises a unitary body of resilient silicone elastomeric material of sufficient thickness to lend rigidity thereto.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-25 | 1987-01-24 | 1987-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-25 | 1991-01-24 | 1991-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-25 | 1995-01-24 | 1995-07-26 | $7700.00 | Window Closed / Lapsed |