Patent ID: 7308129

Claim:
A characteristic amount calculating device for soldering inspection, comprising: design information inputting means for inputting design information of an inspection object; inspection standard inputting means for inputting an inspection standard specifying a defective range on solder amount or solder wetting amount; solder shape calculating means for calculating shape information of a plurality of virtual solder fillets based on said design information; inspection image calculating means for calculating an inspection image according to said shape information of said virtual solder fillets; characteristic amount calculating means for calculating characteristic amounts of virtual solder shapes from said inspection images; solder shape defective/nondefective determining means for determining whether the virtual solder shapes are defective or nondefective from said shape information of said virtual solder fillets by using said inspection standard; and characteristic amount outputting means for outputting said characteristic amounts of said virtual solder shapes and a result of defective/nondefective determination to compare said characteristic amounts with said result of defective/nondefective determination to thereby determine a threshold value of said characteristic amount.