Network system for controlling independent access to stored data among local area networks

• US 7,020,152 B1
• Filed: 11/02/1999
• Issued: 03/28/2006
• Est. Priority Date: 11/05/1998
• Status: Expired due to Term

• Current Assignee: Hitachi High-Tech Science Corporation (Hitachi, Ltd.)
• Original Assignee: SII NanoTechnology Inc. (Hitachi, Ltd.)
• Inventors: Doi, Toshio, Matsumura, Hiroshi, Fujii, Toshiaki, Muramatsu, Masashi
• Primary Examiner(s): Pezzlo, John
• Application Number:
  US09/830,382
• Time in Patent Office: 2,338 Days
• Field of Search: 370/392, 370/252, 370/278, 370/403, 370/401, 370/338, 370/386, 370/381, 370/445, 370/423, 370412-418, 370/230, 370/235, 370/389, 370/359, 370/419, 370/428, 370/463, 700/169, 709/232, 709/216, 709/213, 709/217, 709/319, 709/219, 709/223, 711/221, 711/153, 711/112, 713/155, 713/201, 713/202, 364/200, 380/25, 705/50, 717/101, 714/4, 710/36
• US Class Current: 370/419
• CPC Class Codes: H04L 12/28 characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks] wireless communication networks H04W ; arrangements for dividing the transmission path H04W40/00

Abstract

A network system has a first LAN, a second LAN, and a storage device for storing data accessible from the first LAN and the second LAN. A control apparatus controls accessibility of the data stored in the storage device from the first LAN and the second LAN. The control apparatus includes an access prevention device for preventing access from the first LAN to the second LAN and from the second LAN to the first LAN and a device for overriding a setting of the access prevention device to allow accessibility of the second LAN from the first LAN.

Claims

1. A network system comprising:

a first LAN;

a second LAN;

storage means for storing data accessible from the first LAN and the second LAN; and

control means for controlling accessibility of the data stored in the storage means from the first LAN and the second LAN, the control means including access prevention means for preventing access from the first LAN to the second LAN and from the second LAN to the first LAN, and means for overriding a setting of the access prevention means to allow accessibility of the second LAN from the first LAN.

2. A network system according to claim 1;

wherein the first LAN comprises a LAN on a factory side and the second LAN comprises a LAN on a device side.

3. A network system according to claim 2;

further comprising communication means for communicating the second LAN to a remote service center to allow remote maintenance of the second LAN.

4. A network system according to claim 3;

wherein the second LAN comprises a manufacturing apparatus.

10. A network system according to claim 1;

further comprising communication means for communicating the second LAN to a remote service center to allow remote maintenance of the second LAN.

11. A network system according to claim 1;

wherein the second LAN comprises a manufacturing apparatus.

12. A network system according to claim 1;

wherein the second LAN comprises an inspection apparatus.

13. A network system according to claim 1;

wherein the second LAN comprises a charged particle beam apparatus.

14. A network system according to claim 2;

wherein the second LAN comprises a manufacturing apparatus.

15. A network system according to claim 2;

wherein the second LAN comprises an inspection apparatus.

16. A network system according to claim 2;

wherein the second LAN comprises a charged particle beam apparatus.

17. A network system according to claim 3;

wherein the second LAN comprises an inspection apparatus.

18. A network system according to claim 3;

wherein the second LAN comprises a charged particle beam apparatus.

5. A network system comprising:

a first LAN comprised of a LAN on a factory side;

a second LAN comprised of a LAN on a device side;

storage means for storing data accessible from the first LAN and the second LAN; and

control means for controlling accessibility of the data stored in the storage means from the first LAN and the second LAN, the control means including access prevention means for preventing access from the first LAN to the second LAN and from the second LAN to the first LAN.

6. A network system according to claim 5;

further comprising communication means for communicating the second LAN to a remote service center to allow remote maintenance of the second LAN.

7. A network system according to claim 5;

wherein the second LAN comprises a manufacturing apparatus.

8. A network system according to claim 5;

wherein the second LAN comprises an inspection apparatus.

9. A network system according claim 5;

wherein the second LAN comprises a charged particle beam apparatus.

19. A network system comprising:

a first local area network;

a second local area network;

a storage device for storing data; and

control means for controlling independent accessibility of the data stored in the storage device from the first local area network and the second local area network without allowing access from the first local area network to the second local area network and from the second local area network to the first local area network.

20. A network system according to claim 19;

wherein the first local area network is connected to the second local area network via a transmission control protocol/internet protocol.

21. A network system according to claim 20;

wherein the control means comprises a first network card driver for transmitting a signal from the first local area network to the storage device to allow access of the data in the storage device by the first local area network, and a second network card driver for transmitting a signal from the second local area network to the storage device to allow access of the data in the storage device by the second local area network.

22. A network system according to claim 19;

further comprising communication means for communicating the second local area network to a remote service center to allow remote maintenance of the second local area network.

23. A network system according to claim 22;

wherein the communication means does not permit access of the first local area network by the remote service center.

24. A network system according to claim 19;

wherein the control means comprises an input device for inputting data corresponding to a setting allowing accessibility of the second local area network from the first local area network.

25. A network system according to claim 19;

wherein the second local area network comprises a manufacturing apparatus.

26. A network system according to claim 19;

wherein the second local area network comprises an inspection apparatus.

27. A network system according to claim 19;

wherein the second local area network comprises a charged particle beam apparatus.