Method for manufacturing photocoupler, and photocoupler lead frame sheet

A method for manufacturing a photocoupler, comprising:

• mounting light emitting devices and light receiving devices on a lead frame sheet in which a plurality of light emitting column portions and a plurality of light receiving column portions are alternately arranged, the light emitting column portion including a plurality of light emitting side lead frame portions arranged in a line, the light emitting column portion being provided with three or more light emitting side coupling bars, the light receiving column portion including a plurality of light receiving side lead frame portions arranged in a line, the light receiving column portion being provided with three or more light receiving side coupling bars, one end of the light emitting column portions and one end of the light receiving column portions being interlinked by a linking portion, a first pilot hole being formed in each of one set of column portions of the light emitting column portions and the light receiving column portions, a second pilot hole being formed in a portion except the one set of column portions, the light emitting device being mounted on the light emitting side lead frame portion, and the light receiving device being mounted on the light receiving side lead frame portion;
• positioning the lead frame sheet with respect to a die by cutting off the one set of column portions from the linking portion and inserting a first pilot pin formed on the die into the second pilot hole;
• positioning the one set of column portions with respect to the die and opposing the light emitting devices and the light receiving devices to each other by inserting a second pilot pin formed on the die into the first pilot hole and stacking the light emitting side coupling bars and the light receiving side coupling bars;
• connecting the light emitting side coupling bars and the light receiving side coupling bars to each other on the die;
• forming a resin body so as to cover a pair of the light emitting device and the light receiving device;
• and
• cutting off the light emitting side lead frame portion from the light emitting column portion and cutting off the light receiving side lead frame portion from the light receiving column portion.