Laser programming of integrated circuits
First Claim
1. A method of programming an integrated circuit on a chip, with laser light, the integrated circuit having a plurality of laser fuses and being connected to a plurality of contact pads on the chip, and the chip being covered with a polymer layer which has at least windows on the plurality of contact pads, and comprising at least one wiring interconnect on the polymer layer which is electrically connected to at least one of the plurality of contact pads and ends at a predetermined location on a surface of the chip, wherein the chip is irradiated in a predetermined region with intensive laser light, so that in the wiring interconnect there is created an interconnect opening, in the polymer layer lying thereunder there is created a layer opening and at least one of the plurality of laser fuses is interrupted in the predetermined region.
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Accused Products
Abstract
Laser Programming of Integrated Circuits. The invention relates to the laser adjustment or laser programming of laser fuses of an integrated circuit on a chip, with laser light, the integrated circuit having a plurality of laser fuses and being connected to a plurality of contact pads on the chip, and the chip being covered with a polymer layer which has at least windows on the plurality of contact pads, and comprising at least one wiring interconnect on the polymer layer which is electrically connected to at least one of the plurality of contact pads and ends at a predetermined location on a surface of the chip. To make it possible for integrated circuits to be programmed with laser light as late as possible in the production process, according to the invention the chip is irradiated in a predetermined region with intensive laser light, so that in the wiring interconnect there is created an interconnect opening, in the polymer layer lying thereunder there is created a layer opening and at least one of the plurality of laser fuses is interrupted in the predetermined region.
10 Citations
6 Claims
- 1. A method of programming an integrated circuit on a chip, with laser light, the integrated circuit having a plurality of laser fuses and being connected to a plurality of contact pads on the chip, and the chip being covered with a polymer layer which has at least windows on the plurality of contact pads, and comprising at least one wiring interconnect on the polymer layer which is electrically connected to at least one of the plurality of contact pads and ends at a predetermined location on a surface of the chip, wherein the chip is irradiated in a predetermined region with intensive laser light, so that in the wiring interconnect there is created an interconnect opening, in the polymer layer lying thereunder there is created a layer opening and at least one of the plurality of laser fuses is interrupted in the predetermined region.
- 5. An integrated circuit on a chip which has a plurality of laser fuses and is connected to a plurality of contact pads on the chip, the chip being covered with a polymer layer which has at least windows on the plurality of contact pads, and comprising at least one wiring interconnect on the polymer layer which is electrically connected to at least one of the plurality of contact pads and ends at a predetermined location on a surface of the chip, wherein the at least one wiring interconnect has a reduced interconnect thickness over at least one fuse.
Specification