초록 ▼

A computer providing multiple display capability where one display presents the current document and another display may show a true display of a previously opened document. The computer is a singular processed video data signal source which presents a primary monitor with current video data. A user

A computer providing multiple display capability where one display presents the current document and another display may show a true display of a previously opened document. The computer is a singular processed video data signal source which presents a primary monitor with current video data. A user selected video screen sample of the current processed video data signal is diverted to this invention where it is stored in a memory. Subsequently the stored video screen sample of the processed video data signal is read-out of the memory and reconstituted as an absolute copy of the original processed video data signal and concurrently presented on a secondary monitor. User selection may be attained by a keyboard key-sequence entry, a mouse button click or using an external button-switch. Operation is absolutely independent from operating system constraints, being of equivalent usefulness while running any Operating System versions of Windows.RTM., Unix, MS-DOS, Linux, CP/M86 or Apple-OS. The device is preferably configured as a standalone peripheral, having two video ports connected essentially between the computer's "video output" port and the primary monitor's "video input" port and a third video port coupled with the secondary monitor's "video input" port.

대표청구항 ▼

A computer providing multiple display capability where one display presents the current document and another display may show a true display of a previously opened document. The computer is a singular processed video data signal source which presents a primary monitor with current video data. A user

A computer providing multiple display capability where one display presents the current document and another display may show a true display of a previously opened document. The computer is a singular processed video data signal source which presents a primary monitor with current video data. A user selected video screen sample of the current processed video data signal is diverted to this invention where it is stored in a memory. Subsequently the stored video screen sample of the processed video data signal is read-out of the memory and reconstituted as an absolute copy of the original processed video data signal and concurrently presented on a secondary monitor. User selection may be attained by a keyboard key-sequence entry, a mouse button click or using an external button-switch. Operation is absolutely independent from operating system constraints, being of equivalent usefulness while running any Operating System versions of Windows.RTM., Unix, MS-DOS, Linux, CP/M86 or Apple-OS. The device is preferably configured as a standalone peripheral, having two video ports connected essentially between the computer's "video output" port and the primary monitor's "video input" port and a third video port coupled with the secondary monitor's "video input" port. charged particles (M2) of relatively high mass to charge ratio, wherein said multi-species plasma has a low collisional density in said chamber, and wherein said multi-species plasma is provided in a region of said chamber to allow substantially all of said high mass particles (M2) to move under an influence of said electric field (E) and said magnetic field (B) toward said axis and into contact with said collector, while preventing substantially all of said low mass particles (M1) from moving under an influence of said electric field (E) and said magnetic field (B) into contact with said collector. 2. A plasma filter as recited in claim 1 wherein said collector is located at a distance, rcoll,from said longitudinal axis, and wherein said region in said chamber for said multi-species plasma is between a distance rinfrom said longitudinal axis and a distance routfrom said longitudinal axis, where, rcollis less than rin,and rinis less than rout,(rcollinout), and further where substantially all said particles M1have a cyclotron trajectory T1,at most, less than the difference (rin-rcoll), and substantially all said particles M2have a cyclotron trajectory T2,at least, greater than the difference (rout-rcoll). 3. A plasma filter as recited in claim 2 wherein said particles M1have a cyclotron frequency and said particles M2have a cyclotron frequency, and wherein said low collisional density is realized when respective ratios for cyclotron frequencies of said particles M1and M2to a collisional frequency in said multi-species plasma is greater than approximately one. 4. A plasma filter as recited in claim 3 wherein rcollis approximately equal to the square root of two times smaller than rout(rcoll?rout/2). 5. A plasma filter as recited in claim 1 wherein said container has a first end and a second end and wherein said means for generating said electric field (E) is an electrode located at said first end of said container. 6. A plasma filter as recited in claim 5 wherein said electrode comprises a plurality of substantially coaxial electrode rings. 7. A plasma filter as recited in claim 5 wherein said electrode is a spiral electrode. 8. A plasma filter as recited in claim 1 wherein said magnetic means is a plurality of magnetic coils mounted on said container around said longitudinal axis. 9. A plasma filter as recited in claim 1 further comprising: a means for generating a vacuum in said chamber; and a means for injecting said multi-species plasma into said chamber. 10. A method as recited in claim 3 wherein rcollis approximately equal to the square root of two times smaller than rout(rcoll?rout/ 2). 11. A plasma filter with an inwardly directed radial electric field which comprises: an elongated generally tubular shaped collector defining a longitudinal axis; a means for creating a vacuum around said collector; a magnetic means for generating an axially oriented magnetic field (B) in said vacuum; an electric means for generating a radially oriented electric field (E) in said vacuum, said electric field being directed toward and substantially perpendicular to said collector; and a source for providing a multi-species plasma in said vacuum, said multi-species plasma including charged particles (M1) of relatively low mass to charge ratio and charged particles (M2) of relatively high mass to charge ratio, and wherein said multi-species plasma has a density in said chamber wherein said low mass particles (M1) and said high mass particles (M2) substantially avoid collisions with other said particles (M1and M2) to allow said high mass particles (M2) to move under an influence of said electric field (E) and said magnetic field (B) toward said axis and into contact with said collector. 12. A plasma filter as recited in claim 11 wherein said means for creating a vacuum around said collector comprises: a substantially cylindrical shape container oriented on said longitudinal axis to establish a chamber between said container and said collector with said vacuum being created inside said chamber; and a vacuum pump connected in fluid communication with said chamber for creating said vacuum in said chamber to establish a low collisional density for said plasma wherein said particles M1have a cyclotron frequency and said particles M2have a cyclotron frequency, and wherein said low collisional density is realized when respective ratios for cyclotron frequencies of said particles M1and M2to a collisional frequency in said multi-species plasma is greater than approximately one. 13. A plasma filter as recited in claim 12 wherein said collector is located at a distance, rcoll,from said longitudinal axis, and wherein said multi-species plasma is provided in said chamber between a distance rinfrom said longitudinal axis and a distance routfrom said longitudinal axis where, rcollis less than rin,and rinis less than rout,(rcollinout). 14. A plasma filter as recited in claim 13 wherein said relatively low mass particles (M1) have a cyclotron frequency and a cyclotron trajectory T1,and said particles of relatively high mass (M2) have a cyclotron frequency and a cyclotron trajectory T2,with T2being greater than T1(T2>T1), and wherein T2is, at least, greater than the difference (rout-rcoll) to allow said high mass particles (M2) to move under an influence of said electric field (E) and said magnetic field (B) into contact with said collector, and further wherein T1is, at most, less than the difference (rin-rcoll) to prevent said low mass particles (M1) from moving under said influence of said electric field (E) and said magnetic field (B) into contact with said collector. 15. A plasma filter as recited in claim 14 wherein rcollis approximately equal to the square root of two times smaller than rout(rcoll?rout/2). 16. A plasma filter as recited in claim 14 wherein rout=1 m, rcoll=0.65 m, with M1/M2=26/44 and rin=0.87 m. 17. A method for filtering a multi-species plasma including charged particles (M1) of relatively low mass to charge ratio and charged particles (M2) of relatively high mass to charge ratio, with the multi-species plasma having a density wherein a ratio for the charged particles between their respective cyclotron frequencies and a collisional frequency in said plasma is greater than approximately one, the method comprising the steps of: providing a substantially cylindrical shaped container defining a longitudinal axis with a substantially cylindrical shaped collector oriented along said axis to establish a plasma chamber between said container and said collector; generating a substantially uniform magnetic field (B), said magnetic field being substantially parallel to said axis in said chamber; generating a radially oriented electric field (E) in said chamber, said electric field being directed inwardly from said container to said collector; and providing said plasma in said chamber to allow the high mass particles (M2) to move under an influence of said electric field (E) toward said axis and into contact with said collector while preventing the l ow mass particles (M1) from moving into contact with said collector. 18. A method as recited in claim 17 further comprising the step of creating a vacuum in said chamber. 19. A method as recited in claim 17 wherein said collector is located at a distance, rcoll,from said longitudinal axis, and wherein said multi-species plasma is provided in said chamber between a distance rinfrom said longitudinal axis and a distance routfrom said longitudinal axis where, rcollis less than rin,and rinis less than rout,(rcollinout), and further where substantially all said particles M1have a cyclotron trajectory T1,at most, less than the difference (rin-rcoll), and substantially all said particles M2have a cyclotron trajectory T2,at least, greater than the difference (rout-rcoll). 20. A method as recited in claim 19 wherein said particles M1have a cyclotron frequency and said particles M2have a cyclotron frequency, and wherein said low collisional density is realized when respective ratios for cyclotron frequencies of said particles M1and M2to a collisional frequency in said multi-species plasma is greater than approximately one. face and said substrate. 10. The apparatus as recited in claim 8 wherein said pallet includes a surface facing said substrate and further includes a coating, consisting essentially of silicon carbide (SiC), doped to enhance an electrical conductivity thereof, with said coating being disposed on said pallet between said surface and said substrate. 11. The apparatus as recited in claim 10 wherein said coating has a resistance associate therewith as low as 100 ohm/cm. 12. The apparatus as recited in claim 8 wherein said second subportion is a coating consisting essentially of silicon carbide (SiC) that is annealed to said first subportion. 13. The apparatus as recited in claim 8 wherein said second subportion includes a plurality of tiles each of which consists essentially of silicon carbide (SiC) and is adhered to said first subportion. 14. An apparatus for forming a pattern by impinging an electron beam upon a substrate, said apparatus comprising: a pallet having a surface facing said substrate, with said substrate being supported by said pallet; a mirror, with said pallet resting on said mirror; and first and second bodies, each of which includes silicon carbide (SiC), to maintain thermal stability of said substrate by absorbing thermal energy generated by said electron beam impinging upon said substrate, with said substrate being positioned between said first and second bodies. 15. The apparatus as recited in claim 14 wherein said first body includes first and second subportions, with said first subportion consisting essentially of a conductive material and said second subportion including silicon carbide (SiC), with said second subportion being positioned between said first subportion and said substrate and said second body is positioned between said surface and said pallet. 16. The apparatus as recited in claim 14 wherein said second subportion is a coating consisting essentially of silicon carbide (SiC) that is annealed to said first subportion and said second body is a layer of silicon carbide annealed to said surface. 17. The apparatus as recited in claim 14 wherein said second subportion includes a plurality of tiles each of which consists essentially of silicon carbide (SiC) and is adhered to said first subportion. 18. The apparatus as recited in claim 14 wherein said SiC is doped to enhance a conductivity thereof, providing said first and second bodies with an electrical resistivity as low as 100 ohm/cm. 19. The apparatus as recited in claim 14 wherein said second body includes a coating of said SiC disposed upon said surface.