Patent ID: 7709364

Claim:
A method for low temperature ion implantation, comprising: implanting a wafer in conjunction with a temperature adjusting apparatus adjusting a temperature of said wafer when said wafer is implanted, said temperature adjusting apparatus being in a first state to ensure said wafer ps cooled to a first temperature lower than a temperature of an environment outside of a chamber where said wafer is implanted; and implanting said wafer, said temperature adjusting apparatus being in a second state to ensure said wafer has a second temperature higher than said first temperature, whereby heat produced by said implanting process in said wafer when said temperature adjusting apparatus is in said second state remains at least partially within said wafer, such that a temperature of said wafer is increased; wherein said temperature adjusting apparatus has a cooler and a heater, and is changed from said first state to said second state (a) after occurrence of a majority of said implanting process or (b) by one or more of: turning off an operation of said temperature adjusting apparatus; decreasing said operation of said temperature adjusting apparatus; decreasing an operation of said cooler while an operation of said heater is kept constant; keeping said operation of said cooler constant while enhancing said operation of said heater; decreasing said operation of said cooler while said operation of said heater is enhanced; decreasing or turning off said operation of said cooler while said operation of said heater is off; and enhancing said operation of said cooler while said operation of said heater is enhanced more.