US4778326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for handling semiconductor and similar electronic devices
Assignee: GEL-PAK LLC
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Filing: 1983-05-24
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Granted: 1988-10-18
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Expires: 2003-05-24
Abstract
Abstract Method and apparatus for handling semiconductor chips and the like are disclosed which include the use of a flat flexible film which is attached to the face of a base member. The face of the base member is formed with recesses covered by the flat flexible film. Chips are loaded onto the flat flexible film in good surface contact therewith whereby they are securely held in position by interfacial, adhesive, or other forces between the chips and film. To facilitate removal of chips from the film, the recesses are connected to a vaccuum source, drawing portions of the flexible film into said recesses and providing the film with a texturized, or undulating, surface. The area of contact between the chips and film is thereby reduced which, in turn, results in a reduction in the force by which the chips are attached to the film, thereby enabling removal of the chips by conventional techniques.
Inventors
- 👤 Victor E. Althouse
- 👤 Bruce J. Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:37
CPC Classifications
H; H10; H10P; H10P72/00; H10P72/70; H10P72/78; H10P72/04; H10P72/0442; H10P72/76; H10P72/7604; H10P72/7614; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/5313; Y10T29/53191
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
167 words
A method of handling objects such as semiconductor chips, wafers, or like devices, said method including, attaching a flat sheet member to the flat face of a base member in which recess means are formed, attaching objects to said flat sheet member by interfacial forces between said sheet member and said objects, and deforming the flat sheet member by drawing portions thereof into said recess means for withdrawing portions thereof away from said objects while maintaining the objects substantially in a plane without forming a vacuum between the sheet member and said objects for reducing the overall force by which the objects and flat sheet are held to one another by a reduction in the contact area and interfacial forces between the sheet and said objects to allow for ready removal of said objects from said sheet, the step of deforming the flat sheet member by drawing said portions of the sheet member into said recess means including connection of said recess means to a vacuum source.
Claim 2
Independent Claim
167 words
A method of handling objects such as semiconductor chips, wafers, or like devices, said method including, attaching a flat sheet member to the flat face of a base member in which recess means are formed, attaching objects to said flat sheet member by interfacial forces between said sheet member and said objects, and deforming the flat sheet member by drawing portions thereof into said recess means for withdrawing portions thereof away from said objects while maintaining the objects substantially in a plane without forming a vacuum between the sheet member and said objects for reducing the overall force by which the objects and flat sheet are held to one another by a reduction in the contact area and interfacial forces between the sheet and said objects to allow for ready removal of said objects from said sheet, the step of deforming the flat sheet member by drawing said portions of the sheet member into said recess means including connection of said recess means to a vacuum source.
Claim 3
Dependent Claim
41 words
A method of handling objects such as semiconductor chips, wafers, or like devices as defined in claim 1 wherein said flat sheet member comprises an elastomer which returns to a flat condition upon restoration of ambient pressure to said recess means.
Claim 4
Dependent Claim
28 words
A method as defined in claim 1 wherein said objects are attached to said flat sheet member by non-adhesive, interfacial, forces between said object and flat sheet member.
Claim 5
Dependent Claim
29 words
A method as defined in claim 1 wherein said objects are attached to said flat sheet by pressure sensitive adhesive interfacial forces between said objects and flat sheet member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |