Patent ID: 9165882
Filing Date: 2015-10-20
Classification: G06F,H01L

Abstract:
1. A method of making a semiconductor device comprising a device portion and a metal layer formed on the device portion and connected to the device portion, wherein the metal layer includes a power rail providing power to an integrated circuit component in the device portion, wherein the method for forming the power rail comprises steps of: determining that a first criterion is met when directions of a first current and a second current around a first end and a second end of a metal segment respectively are opposite by using a computer, wherein the metal segment is a part of a power rail in at least one design file of a semiconductor device and is enclosed by two terminal via arrays; determining that a second criterion is met when a length of the metal segment is not larger than an electromigration critical length by using a computer; including the metal segment in the at least one design file with a first current density limit depending on the length of the metal segment when the first and the second criteria are met by using a computer; and fabricating, by using a fabrication system, the semiconductor device according to the at least one design file.