What is claimed is:
1. An information processing apparatus, comprising:
simplified user switching means having a simplified user switching function provided by an operating system for switching a user from a first user to a second user without terminating an application started up by the first user;
wherein at a time of switching the first user to the second user by said simplified user switching means, data of the application started up by the first user is temporarily stored as temporary storage file.
2. An information processing apparatus as claimed in claim 1,
wherein the temporary storage file includes a data generated or edited by the first user and an information indicating whether the temporary storage file is valid or invalid; and
when the first user is brought into an inactive state by switching operation using said simplified user switching means, the information indicating the activity of the temporary storage file is set to indicate that the temporary storage file is valid, and is stored together with the data generated or edited by the first user, and when the first user is brought into an active state, the information indicating the activity of the temporary storage file is set to indicate that the temporary storage file is invalid, and is stored.
3. An information processing apparatus as claimed in claim 2,
wherein search for the temporary storage file is performed after start up of the application; when the file is present, the information indicating the activity of the file is checked; and when the file is valid, the temporary storage file is opened according to an instruction from either the first user or the second user or in a forced manner.
4. An information processing apparatus as claimed in claim 1,
wherein file storing processing for temporary storing, at the time of switching the first user to the second user by said simplified user switching means, the data of the application started up by the first user as the temporary storage file is registered on the application; and
when the first user is brought into an inactive state by switching operation using said simplified user switching means, the registered file storing processing is performed, whereby the temporary storage file is stored.
5. An information processing apparatus as claimed in claim 1,
wherein a message and a parameter added to the message issued when operation related to the simplified user switching function is performed are used for the application to determine whether each of the first user and the second user is active.
6. An information processing apparatus as claimed in claim 1,
wherein the application determines whether each of the first and the second user is active by calling a function at fixed time intervals.
7. A program used for an information processing apparatus, said apparatus comprising;
simplified user switching means having a simplified user switching function provided by an operating system for switching a user from a first user to a second user without terminating an application started up by the first user;
wherein at a time of switching the first user to the second user by said simplified user switching means, data of the application started up by the first user is temporarily stored as a temporary storage file.
8. A program used for an information processing apparatus, said apparatus comprising:
simplified user switching means having a simplified user switching function provided by an operating system for switching a user from a first user to a second user without terminating an application started up by the first;
wherein file storing processing for temporarily storing the data generated or edited by the first user as the temporary storage file to be registered in advance thereon; and when the first user is brought into an inactive state by switching operation using said simplified switching means, the registered file storing processing is performed, whereby the temporary storage file is stored.
9. A program used for an information processing apparatus according to claim 7,
wherein the temporary storage file includes a data generated or edited by the first user and an information indicating whether the temporary storage file is valid or invalid; and
when the first user is brought into an inactive state by switching operation using said simplified user switching means, the information indicating the activity of the temporary storage file is set to indicate that the temporary storage file is valid, and is stored together with the data generated or edited by the first user, and when the first user is brought into an active state, the information indicating the activity of the temporary storage file is set to indicate that the temporary storage file is invalid, and is stored.
10. A program used for an information processing apparatus as claimed in claim 9,
wherein search for the temporary storage file is performed after start up by an active user; when the file is present, the information indicating the activity of the file is checked; and when the file is valid, the temporary storage file is opened according to an instruction from the user or in a forced manner.
11. A program for an information processing apparatus as claimed in claim 7,
wherein a message and a parameter added to the message issued when operation related to the simplified user switching function is performed are used to determine whether each of the first and the second user is active.
12. An information processing apparatus as claimed in claim 7,
wherein it is determined, by calling a function at fixed time intervals, whether each of the first and the second user is active.
13. A program used for an information processing apparatus according to claim 8,
wherein the temporary storage file includes a data generated or edited by the first user and an information indicating whether the temporary storage file is valid or invalid; and
when the first user is brought into an inactive state by switching operation using said simplified user switching means, the information indicating the activity of the temporary storage file is set to indicate that the temporary storage file is valid, and is stored together with the data generated or edited by the first user, and when the first user is brought into an active state, the information indicating the activity of the temporary storage file is set to indicate that the temporary storage file is invalid, and is stored.
14. A program used for an information processing apparatus as claimed in claim 13,
wherein search for the temporary storage file is performed after start up by an active user; when the file is present, the information indicating the activity of the file is checked; and when the file is valid, the temporary storage file is opened according to an instruction from the user or in a forced manner.
15. A program for an information processing apparatus as claimed in claim 8,
wherein a message and a parameter added to the message issued when operation related to the simplified user switching function is performed are used to determine whether each of the first and the second user is active.
16. An information processing apparatus as claimed in claim 8,
wherein it is determined, by calling a function at fixed time intervals, whether each of the first and the second user is active.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1-13. cancelled.
14. An SOI wafer in which at least a silicon active layer is formed on a support substrate, wherein at least the silicon active layer consists of silicon single crystal grown by Chochralski method, which is occupied by N region outside OSF generated in a shape of a ring and has no defect region detected by Cu deposition method.
15. The SOI wafer according to claim 14, wherein a thickness of the silicon active layer is 200 nm or less.
16. The SOI wafer according to claim 14, wherein the silicon active layer is formed by being bonded to the support substrate via an oxide film.
17. The SOI wafer according to claim 15, wherein the silicon active layer is formed by being bonded to the support substrate via an oxide film.
18. The SOI wafer according to claim 16, wherein a thickness of the oxide film is in the range from 2 nm to 3000 nm.
19. The SOI wafer according to claim 17, wherein a thickness of the oxide film is in the range from 2 nm to 3000 nm.
20. The SOI wafer according to claim 14, wherein the SOI wafer is produced by ion implantation delamination method.
21. The SOI wafer according to claim 15, wherein the SOI wafer is produced by ion implantation delamination method.
22. The SOI wafer according to claim 16, wherein the SOI wafer is produced by ion implantation delamination method.
23. The SOI wafer according to claim 17, wherein the SOI wafer is produced by ion implantation delamination method.
24. The SOI wafer according to claim 18, wherein the SOI wafer is produced by ion implantation delamination method.
25. The SOI wafer according to claim 19, wherein the SOI wafer is produced by ion implantation delamination method.
26. A method for producing an SOI wafer comprising steps of, in a bond wafer that is to be a silicon active layer and a base wafer that is to be a support substrate, implanting hydrogen ions, rare gas ions or mixture gas ions of these gases from a surface of the bond wafer to form an ion-implanted layer inside the bond wafer, bonding the surface of the ion-implanted side of the bond wafer and a surface of the base wafer via an oxide film or directly, and delaminating a part of the bond wafer at the ion-implanted layer by heat treatment to form an SOI wafer, wherein a silicon wafer consisting of silicon single crystal grown by Chochralski method, which is occupied by N region outside OSF generated in a shape of a ring and has no defect region detected by Cu deposition method, is used as the bond wafer.