Patent Number: 
Section: claims

1. An X-ray exposure apparatus comprising: a point X-ray source for generating pulsed X-rays, which are emitted radially from said point X-ray source;  first to nth exposure-means, each of which is disposed in a position facing said point X-ray source to receive the pulsed X-rays in an approximately perpendicular direction, to each of the first to nth exposure means,  wherein said exposure means project patterns of first to nth masks onto respective ones of first to nth substrates that are to be exposed. 2. The apparatus according to  claim 1 , further comprising: claim 1 first to nth, where a represents an integer of at least two, collimators for varying at least one of angle and intensity of X-rays generated by said X-ray source. 3. The apparatus according to  claim 1 , further comprising: claim 1 first to nth shutters situated between said X-ray source and respective ones of the masks and having at least one shielding member for shielding X-rays that irradiate the masks;  first to nth shutter drive units for driving respective ones of said shutters; and  a shutter controller for controlling each of said shutters. 4. The apparatus according to  claim 3 , wherein said shutter drive unit controls said first to nth shutters depending upon the state of said X-ray source and at least one state among the states of said first to nth exposure means. claim 3 5. The apparatus according to  claim 1 , wherein timing of X-ray emission from said X-ray source is controlled by an X-ray emission trigger signal, claim 1 said apparatus further comprising an X-ray emission trigger generating unit for generating the X-ray emission trigger signal depending upon the state of said X-ray source and at least one state among the states of said first to nth exposure means. 6. The apparatus according to  claim 1 , wherein intensity of X-rays from said X-ray source is controlled by an X-ray intensity control signal, claim 1 said apparatus further comprising an X-ray intensity control signal generator for generating an X-ray intensity signal control signal depending upon the state of said X-ray source and at least one state among the states of said first to nth exposure means. 7. The apparatus according to  claim 6 , further comprising a total control unit, which receives information for specifying the internal status of a point source X-ray source unit having said point-source X-ray source, as a status signal from said point-source X-ray source unit, for exercising total control which combine said shutter control unit and a plurality of controllers that control the exposure states of each of said exposure means based upon measurement values from a plurality of sensors that measure the X-ray intensities of respective ones-of said exposure means, claim 6 wherein said total control unit sends said X-ray emission trigger signal generating unit a trigger generation command and sends said X-ray intensity control signal generator at least one of an X-ray intensity value and an X-ray intensity command. 8. The apparatus according to  claim 7 , wherein said total control unit has means for controlling exposure timing of each exposure means in accordance with a prescribed objective, said exposure timing being tunable within a range of set values that have been set in said total control unit. claim 7 9. The apparatus according to  claim 1 , further comprising first to nth moving means for moving at least one of respective ones of said masks and said substrates. claim 1 10. The apparatus according to  claim 1 , wherein an optical-axis center of each collimator is configured radially with respect to the X-ray source. claim 1 11. The apparatus according to  claim 1 , further comprising: claim 1 an interface for being connected to a network;  a computer for running network software for communicating maintenance information for said exposure apparatus by data communication via the network; and  a display for displaying the maintenance information for said exposure apparatus communicated by the network software run by said computer. 12. The apparatus according to  claim 11 , wherein said network software provides said display with a user interface for accessing a maintenance database, which is connected to an external network of a plant at which said X-ray exposure apparatus has been installed, and which is supplied by a vendor or user of the X-ray exposure apparatus, thereby making it possible to obtain information from the database via said external network. claim 11 13. A method of manufacturing a semiconductor device comprising the steps of: placing a plurality of semiconductor manufacturing apparatus, inclusive of an X-ray exposure apparatus, in a plant for manufacturing semiconductor devices; and  manufacturing a semiconductor device using the plurality of manufacturing apparatus,  the X-ray exposure apparatus including:  (i) a point X-ray source for generating pulsed X-rays, which at emitted radially from the X-ray source; and  (ii) first to nth exposure means, each of which is disposed in a position facing said point X-ray source to receive the pulsed X-rays in an approximately perpendicular direction to each of the first to nth exposure means,  wherein the exposure means project patterns of first to nth masks onto respective ones of first to nth substrates that are to be exposed. 14. The method according to  claim 13 , further comprising: claim 13 interconnecting the plurality of semiconductor manufacturing apparatuses by a local-area network;  connecting the local-area network and an external network outside the plant;  acquiring information relating to the exposure apparatus from a database on the external network utilizing the local-area network and the external network; and  controlling the exposure apparatus based upon the information acquired. 15. The method according to  claim 14 , wherein maintenance information for the manufacturing apparatus is obtained by accessing, by data communication via the external network a database provided by a vendor or user of the exposure apparatus, or production management is performed by data communication with a semiconductor manufacturing plant other than the first-mentioned semiconductor manufacturing plant via the external network. claim 14 16. A semiconductor manufacturing plant, comprising: a plurality of semiconductor manufacturing apparatus inclusive of an exposure apparatus;  a local-area network for interconnecting said plurality of semiconductor manufacturing apparatus; and  a gateway for connecting said local-area network and an external network outside said plant, whereby information relating to at least one of said plurality of semiconductor manufacturing apparatus can be communicated by data communication,  said X-ray exposure apparatus including:  (i) a point X-ray source for generating pulsed X-rays, which are emitted radially from said point X-ray source; and  (ii) first to nth exposure means, each of which is disposed in a position facing said point X-ray source to receive the pulsed X-rays in an approximately perpendicular direction, to each of the first to nth exposure means,  wherein said exposure means project patterns of first to nth masks onto respective ones of first to nth substrates that are to be exposed. 17. A method of maintaining an X-ray exposure apparatus installed in a semiconductor manufacturing plant, said method comprising the steps of: providing a maintenance database, which is connected to an external network of the semiconductor manufacturing plant, by a vendor or user of the X-ray exposure apparatus;  connecting the X-ray exposure apparatus to a local-area network within the semiconductor manufacturing plant; and  maintaining the X-ray exposure apparatus, based upon information that is stored in the maintenance database, utilising the external network and the local-area network,  the X-ray exposure apparatus including:  (i) a point X-ray source for generating pulsed X-rays, which are emitted radially from said point X-ray source; and  (ii) first to nth exposure means, each of which is disposed in a position facing said point X-ray source and to receive the X-rays in an approximately perpendicular direction, to each of the first to nth exposure means,  wherein said exposure means project patterns of first to nth masks onto respective ones of first to nth substrates that are to be exposed.