Abstract:
Semiconductor chips with curable out of specification measured values of an anneal-activated parameter are identified at a test step. A plurality of anneal plans are generated to include at least one of the identified semiconductor chips. A net yield improvement is calculated for each anneal plan. Each anneal plan includes the paths of a laser beam across the wafer to be irradiated, and optionally includes an azimuthal angle of the wafer as a function of time. The net yield improvement is the difference between an estimated yield improvement from selected target semiconductor chips for irradiation and an estimated yield loss due to collateral irradiation of functional semiconductor chips for each anneal plan. After simulating the net yield improvements for all the anneal plans, the anneal plan providing the greatest net yield improvement can be selected and utilized.
Abstract:
Contact openings are formed into a dielectric material exposing a surface portion of a semiconductor substrate. An interfacial oxide layer is then formed in each contact opening and on an exposed surface portion of the interfacial oxide layer. A NiPt alloy layer is formed within each opening and on the exposed surface portion of each interfacial oxide layer. An anneal is then performed that forms a contact structure of, from bottom to top, a nickel disilicide alloy body having an inverted pyramidal shape, a Pt rich silicide cap region and an oxygen rich region. A metal contact is then formed within each contact opening and atop the oxygen rich region of each contact structure.
Abstract:
A method for forming a precision resistor or an e-fuse structure where tungsten silicon is used. The tungsten silicon layer is modified by changing the crystalline structure to a tetragonal tungsten silicon layer.
Abstract:
Relaxed silicon germanium fins are formed on a bulk silicon substrate through the lateral recrystallization of molten silicon germanium having high germanium content. Following formation of the silicon germanium fins, the silicon is selectively recessed. The resulting trenches are filled with electrically insulating material and then recessed down to the bottoms of the fins.
Abstract:
An aspect of the invention includes a method for forming a contact in a dielectric layer over a semiconductor substrate. The method may comprise: forming a contact opening in a dielectric layer over the semiconductor substrate to expose an upper portion of the semiconductor substrate; depositing a first liner layer to conformally coat the contact opening; causing a portion of the first liner layer to diffuse into the upper portion of the semiconductor substrate to form a first intermix region at the upper portion of the semiconductor substrate; depositing a refractory metal layer over the first intermix region; and depositing a metal in the contact opening thereby forming the contact.
Abstract:
Contact openings are formed into a dielectric material exposing a surface portion of a semiconductor substrate. An interfacial oxide layer is then formed in each contact opening and on an exposed surface portion of the interfacial oxide layer. A NiPt alloy layer is formed within each opening and on the exposed surface portion of each interfacial oxide layer. An anneal is then performed that forms a contact structure of, from bottom to top, a nickel disilicide alloy body having an inverted pyramidal shape, a Pt rich silicide cap region and an oxygen rich region. A metal contact is then formed within each contact opening and atop the oxygen rich region of each contact structure.
Abstract:
An aspect of the invention includes a method for forming a contact in a dielectric layer over a semiconductor substrate. The method may comprise: forming a contact opening in a dielectric layer over the semiconductor substrate to expose an upper portion of the semiconductor substrate; depositing a first liner layer to conformally coat the contact opening; causing a portion of the first liner layer to diffuse into the upper portion of the semiconductor substrate to form a first intermix region at the upper portion of the semiconductor substrate; depositing a refractory metal layer over the first intermix region; and depositing a metal in the contact opening thereby forming the contact.