Patent ID: 7575950

Claim:
A method of manufacturing a semiconductor device, said method comprising the steps of: (a) forming a nonvolatile memory of a first type and a nonvolatile memory of a second type different from said first type in a semiconductor substrate; (b) after said step (a), dividing said semiconductor substrate into separate pieces corresponding to individual semiconductor chips; (c) packaging each of said semiconductor chips, wherein the nonvolatile memory of said first type is a nonvolatile memory of a phase change type, wherein the nonvolatile memory of said second type is a nonvolatile memory of a non-phase change type, wherein the step (c) includes a thermal process step at 100° to 300° C., and wherein said step (c) includes the step of performing resin encapsulation with respect to each of said semiconductor chips; said method further comprising the step of: (d) after said step (a) and before said step (c), recording first information including trimming data, memory relief information, the manufacturing number of the semiconductor device or the manufacturing history of the semiconductor device in the nonvolatile memory of said second type, and wherein, before said step (c), said first information is not recorded in the nonvolatile memory of said first type.