Parameter adjustment in a MOS integrated circuit
First Claim
1. A method of manufacturing an integrated circuit to meet performance specifications for power dissipation, comprising:
- a) fabricating at least one first prototype integrated circuit with a set of masks including a first mask for defining at least one active area of the integrated circuit;
b) testing the at least one prototype integrated circuit to determine whether performance specifications are met;
c) determining the size of the at least one active area required to meet the performance specifications based on the test results, if the performance specifications are not met;
d) creating a second mask for defining the at least one active area having the determined size;
e) replacing the first mask by the second mask to create a second set of masks;
f) fabricating at least one second prototype integrated circuit with the second set of masks;
g) testing the at least one second prototype integrated circuit to determine whether performance specifications are met; and
h) proceeding with manufacture of the integrated circuit with the second set of masks if the performance specifications are met.
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Accused Products
Abstract
A method of manufacturing an integrated circuit including adjusting a parameter of the operation of the integrated circuit, such as power dissipation, after prototype testing by changing only one mask. If prototype testing indicates that the performance specification for power dissipation, for example, is not met, the power dissipation can be adjusted by changing the size of the active areas to change the channel width of the gates of the circuit, by changing the size of the patterns of the active area masks. To decrease power dissipation, the size of the active area is decreased. Only the active mask need be changed. Preferably, the active area around the original contacts are maintained so that the positions of the contacts need not be changed. Consequently, the mask for defining the position of the contacts and the masks for defining the metallization layers need not be changed. To increase power dissipation, the size of the active areas is increased. The values of other parameters may be changed, as well.
64 Citations
27 Claims
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1. A method of manufacturing an integrated circuit to meet performance specifications for power dissipation, comprising:
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a) fabricating at least one first prototype integrated circuit with a set of masks including a first mask for defining at least one active area of the integrated circuit;
b) testing the at least one prototype integrated circuit to determine whether performance specifications are met;
c) determining the size of the at least one active area required to meet the performance specifications based on the test results, if the performance specifications are not met;
d) creating a second mask for defining the at least one active area having the determined size;
e) replacing the first mask by the second mask to create a second set of masks;
f) fabricating at least one second prototype integrated circuit with the second set of masks;
g) testing the at least one second prototype integrated circuit to determine whether performance specifications are met; and
h) proceeding with manufacture of the integrated circuit with the second set of masks if the performance specifications are met. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of reconfiguring parameters of transistors in a metal oxide semiconductor integrated circuit to meet performance specifications after testing of a prototype of the integrated circuit fabricated by a set of masks, comprising:
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determining a size of at least one active area of the integrated circuit required to meet the performance specifications, based on the testing of the prototype integrated circuit, if the testing indicates that a parameter of the integrated circuit does not meet the performance specifications; and
creating a new mask for defining the at least one active area based on the determining step. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method of adjusting parameters of transistors in a metal oxide semiconductor logic circuit after prototype testing, comprising:
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fabricating at least one prototype logic circuit with a set of custom masks; and
adjusting the parameters of the logic circuit by changing the configuration of only one layer of the transistor of the logic circuit. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of reconfiguring parameters of transistors in a metal oxide semiconductor integrated circuit after prototype testing to decrease power dissipation to meet performance specifications, the integrated circuit having been made in a fabrication process using a set of masks including a first mask for defining the active areas of the integrated circuit, comprising:
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determining the configuration of the active areas of the integrated circuit to decrease gate widths to decrease the power dissipation, based on the test results; and
creating a new mask for defining the active areas, the new mask having a portion for defining a portion of the active area at the original position of the contacts to the active area. - View Dependent Claims (26, 27)
replacing the first mask by the new mask in the set of masks, the other masks remaining the same; and
fabricating a second prototype integrated circuit with the set of masks including the new mask.
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27. The method of claim 25, comprising fabricating at least one first prototype integrated circuit with a set of masks including a mask for defining at least one contact to the active area midway between adjacent gates.
Specification