Patent Number: 
Section: claims

1. An ion implantation device that implants ions in a substrate,wherein the ion implantation device has:a chamber including a cover having a small cylindrical through-hole;an irradiation means that radiates ions;a retention means that retains at least one substrate;a detection means that detects, in a noncontact state, temperature information pertaining to the temperature of a substrate retained by the aforementioned retention means, wherein the detection means comprises a thermopile located in said small cylindrical through-hole;a supply means that supplies a cooling medium to the aforementioned retention means to enable heat exchange for the substrate retained by the aforementioned retention means;and a control means that calculates the surface temperature of the substrate retained by the aforementioned retention means based on the temperature information detected by the aforementioned detection means and determines whether the calculated substrate surface temperature is within a permissible temperature range. 2. The ion implantation device recorded in claim 1, wherein the aforementioned control means halts the radiation of ions by the aforementioned irradiation means when it is determined that the aforementioned calculated substrate surface temperature is outside of the aforementioned permissible temperature range. 3. The ion implantation device recorded in claim 1, wherein the aforementioned permissible temperature range is a temperature range permitted with the ion implantation process and the aforementioned control means records information related to the permissible temperature range in a memory. 4. The ion implantation device recorded in claim 1, wherein the aforementioned control means controls the aforementioned supply means based on the aforementioned calculated substrate surface temperature. 5. The ion implantation device recorded in claim 4, wherein the aforementioned control means controls at least one of: the temperature of the cooling medium or the amount of cooling medium supplied by the aforementioned supply means. 6. The ion implantation device recorded in claim 1, wherein the aforementioned control means records in a memory a correlation between the temperature information for a dummy silicon substrate and the surface temperature thereof, and the aforementioned control means calculates the surface temperature of a process silicon substrate based on the temperature information for the process silicon substrate and the aforementioned correlation. 7. The ion implantation device recorded in claim 6, wherein the aforementioned detection means includes an infrared sensor and the aforementioned temperature information is a voltage generated by the aforementioned infrared sensor according to the heat radiated from the substrate. 8. The ion implantation device recorded in claim 6, wherein the surface temperature of the dummy silicon substrate included in the aforementioned correlation is a value observed on a thermo label attached to the surface of a dummy silicon substrate. 9. The ion implantation device recorded in claim 1, wherein the aforementioned retention means includes a rotatable disk that retains multiple substrates and is used for batch processing, and the aforementioned disk exchanges heat by means of a cooling medium supplied by the aforementioned supply means. 10. The ion implantation device recorded in claim 1, wherein the aforementioned retention means includes a retention member that retains one substrate and is used for single-substrate processing, and the aforementioned retention member exchanges heat by means of a cooling medium supplied by the aforementioned supply means. 11. An ion implantation device that implants ions in a substrate, wherein the ion implantation device has:a chamber including a cover having a small cylindrical through-hole;an irradiation unit that radiates ions;a retainer that retains at least one substrate;a sensor that detects, in a noncontact state, temperature information pertaining to the temperature of the at least one substrate retained by the retainer, wherein the sensor comprises a thermopile located in said small cylindrical through-hole;a cooling medium supply unit that supplies a cooling medium to the retainer to enable heat exchange for the substrate;and a control unit that calculates the surface temperature of the at least one substrate based on the temperature information detected by the sensor and determines whether the calculated substrate surface temperature is within a permissible temperature range. 12. The ion implantation device recorded in claim 11, wherein the control unit halts the radiation of ions by the irradiation unit when it is determined that the calculated substrate surface temperature is outside of the permissible temperature range. 13. The ion implantation device recorded in claim 11, wherein the permissible temperature range is a temperature range permitted with the ion implantation process and the control unit records information related to the permissible temperature range in a memory. 14. The ion implantation device recorded in claim 11, wherein the control unit controls the cooling medium supply unit based on the calculated substrate surface temperature. 15. The ion implantation device recorded in claim 14, wherein the control unit controls at least one of: the temperature of the cooling medium or the amount of cooling medium supplied by the cooling medium supply unit. 16. The ion implantation device recorded in claim 14, wherein the control unit records in a memory a correlation between the temperature information for a dummy silicon substrate and the surface temperature thereof, and the control unit calculates the surface temperature of a process silicon substrate based on the temperature information for the process silicon substrate and said correlation. 17. The ion implantation device recorded in claim 16, wherein the sensor an infrared sensor and the aforementioned temperature information is a voltage generated by the infrared sensor according to the heat radiated from the substrate. 18. The ion implantation device recorded in claim 17, wherein the surface temperature of the dummy silicon substrate included in the correlation is a value observed on a thermo label attached to the surface of a dummy silicon substrate. 19. The ion implantation device recorded in claim 18, wherein the retainer includes a rotatable disk that retains multiple substrates and is used for batch processing, and the disk exchanges heat by means of a cooling medium supplied by the cooling medium supply unit. 20. The ion implantation device recorded in claim 19, wherein the retainer includes a retention member that retains one substrate and is used for single-substrate processing, and the retention member exchanges heat by means of a cooling medium supplied by the cooling medium supply unit.