Processing a memory link with a set of at least two laser pulses
OwnerYunlong Sun, Edward Swenson +1inventors
InventorsYunlong Sun, Edward Swenson, Richard Harris
Life of this patent
Estimating the term…
Abstract
A set (50) of laser pulses (52) is employed to sever a conductive link (22) in a memory or other IC chip. The duration of the set (50) is preferably shorter than 1,000 ns; and the pulse width of each laser pulse (52) within the set (50) is preferably within a range of about 0.1 ps to 30 ns. The set (50) can be treated as a single “pulse” by conventional laser positioning systems (62) to perform on-the-fly link removal without stopping whenever the laser system (60) fires a set (50) of laser pulses (52) at each link (22). Conventional IR wavelengths or their harmonics can be employed.
Claims38
A laser system for severing a conductive link in an integrated circuit (IC), comprising:
- a beam positioning system operable to utilize position data representative of locations of one or more conductive links and to coordinate directing at least two laser pulses to a selected conductive link, the laser pulses including a first laser pulse and a second laser pulse and each of the first and second laser pulses producing a laser spot at the integrated circuit,
- wherein the laser spots are in movement relative to the selected conductive link while the laser pulses are directed to the selected conductive link, the first and second laser pulses are sequentially directed to the selected conductive link, and the laser pulses sever the selected conductive link.
A laser system for severing a conductive link in an integrated circuit (IC), comprising:
- a beam positioning system operable to utilize position data representative of locations of one or more conductive links and to coordinate directing at least two laser pulses to a selected conductive link, wherein the laser pulses include a first laser pulse and a second laser pulse, the laser pulses traverse through a laser pulse gating device and a focusing lens, and each of the first and second laser pulses produces a laser spot at the integrated circuit, and
- wherein the focusing lens is in movement relative to the selected conductive link while the laser pulses are directed to the selected conductive link, the first and second laser pulses are sequentially directed to the selected conductive link, and the laser pulses sever the selected conductive link.
A laser system for severing a conductive link in an integrated circuit (IC), comprising:
- a beam positioning system operable to utilize position data representative of locations of one or more conductive links provided above at least one platform and to coordinate directing at least two laser pulses to a selected conductive link, wherein the laser pulses include a first laser pulse and a second laser pulse, the laser pulses traverse through a laser pulse gating device, and each of the first and second laser pulses produce a laser spot at the integrated circuit, and
- wherein the laser spots are in movement relative to the selected conductive link while the laser pulses are directed to the selected conductive link, the platform is in motion while the laser pulses are directed to the selected conductive link, the first and second laser pulses are sequentially directed to the selected conductive link, and the laser pulses sever the selected conductive link.
Dependencies are inferred from the claim text.