Pin attachment tool and method of capacitive brazing

An attachment tool for attaching a new pin to a base of an old pin removed from a circuitized substrate in a module for an integrated circuit assembly including at least one circuit device mounted on said substrate, comprising,

• (a) a pin vise comprising an upper body in electrical contact with a pin-clamping means having a dual-tapered lower body terminating in a clamping means having an axial throat in which said new pin is removably disposed;
• (b) a stepped sleeve means having an upper bore in an upper sleeve body, and a lower bore in a lower sleeve body, said upper bore being dimensioned to provide sufficient radially inward axial pressure when said sleeve is advanced upwards over said pin-clamping means, to snugly secure said new pin;
• and,
• (c) a locating collar having an internal through-bore within which said pin-clamping means is slidably inserted, said collar being provided with at least two longitudinal passages circumferentially spaced-apart so as to mate with at least two pins.

A system for replacing a damaged pin, separated near its base from the substrate in a module for an integrated circuit assembly including at least one circuit device mounted on a circuitized substrate, with a new pin, said system comprising,

• (a) an attachment tool for attaching a new pin to a base of an old pin removed from said substrate,
• (b) a ribbon of brazing alloy, a terminal portion of said ribbon being located above and in close proximity to said base,
• (c) a power supply to provide a stored electrical charge having sufficient energy to melt said terminal portion of said ribbon when said charge is fired,
• (d) a first conductive means to establish an electrically conductive path from said ribbon to one terminal of said power supply, and,
• (e) a second conductive means to establish an electrically conductive path from said new pin to the other terminal of said power supply,
• whereby said ribbon is melted when said charge is fired, so as to braze the head of said new pin to said old base without damaging said integrated circuit.