Abstract: An ion implantation method includes generating CmHy+ ions (m is such an integer as 4?m?6, and y is such an integer as 1?y?2m+2) using an ion generating material expressed by CnHx (n is such an integer as 4?n?6, and x is such an integer as 1?x?2n+2), and implanting the ions into a wafer.

Abstract: An ion implantation method includes generating CmHy+ ions (m is such an integer as 4?m?6, and y is such an integer as 1?y?2m+2) using an ion generating material expressed by CnHx (n is such an integer as 4?n?6, and x is such an integer as 1?x?2n+2), and implanting the ions into a wafer.

Abstract: An oil-in-water emulsified composition containing; (A) ester oil which is in liquid state at 25° C. (B) sphingosines represented by the formula (1) (wherein, R1 represents hydrocarbon group which may have a substituent; Y represents a methylene group, a methine group or an oxygen atom; X1,X2 and X3 are H, OH or an acetoxy group; X4 represents H, an acetyl group or the like; R2 and R3 are H, OH and the like; R represents H or an amidino group; “a” stands for 2 or 3;) (C) an acid compound selected from the group consisting of inorganic acid or an organic acid having 5 or less carbon atoms, and (D) cholesterol or phytosterol, wherein the ratio of a liquid oil component containing Component (A) in the total amount of oil phase is 5 to 90 wt %.