Patent ID: 7427009

Claim:
A capillary tip for deforming a bonding wire, comprising: a bottom face surrounding an inner periphery at the bottom of the capillary tip, the bottom face extending substantially radially in a direction along an intended bonding surface for pressing the bonding wire against the bonding surface; a first inclined inwardly tapering surface, which appears as two straight lines when viewed in cross-section, and having a single interfacial angle between the two straight lines, the first inclined surface being located between the bottom face and a second inclined inwardly tapering surface, which appears as two straight lines when viewed in cross-section, a lower end of the first inclined surface merging with a radially outer margin of the bottom face; and the second inclined inwardly tapering surface, which is located between the first inclined surface and an outer periphery of the capillary tip, the second inclined surface extending obliquely to the first inclined surface, the second inclined surface being inclined at a single angle with respect to the bonding surface.