Patent ID: 6711802
Filing Date: 2004-03-30
Classification: G02B,Y10T

Abstract:
A method of manufacturing a multi-core ferrule, the method comprising the steps of;providing a plurality of flat-surface metal sheets including at least one of a top sheet and a back side sheet, providing a plurality of apertures of the same number in each sheet, including the steps of: forming apertures of high accuracy in diameter in the back side sheet, forming apertures of lower accuracy in diameter which are larger than a standard area of apertures in said back side sheet, in each other said sheet, arranging the apertures to have positions and diameters respectively such that the apertures in said sheets communicate with each other when placed in overlying relation so as to be capable of forming cavities, laminating said plurality of flat-surface metal sheets such that the apertures in each sheet overlie and communicate with each other, and fixing said plurality of flat-surface metal sheets together.