Method of forming electrical connections with solder dispensing and reflow
Abstract:
A method for interconnecting multiple components of a head-gimbal assembly with a solder joint, including the steps of positioning a first component adjacent to a second component to provide a connection area between the first and second components, dispensing a solder sphere to a capillary tube comprising tapered walls, wherein the capillary tube is positioned with an exit orifice above the connection area between the first and second components, pressurizing the capillary tube until a predetermined pressure is reached, applying a first laser pulse to the solder sphere to provide a level of thermal energy to liquefy the solder sphere, detecting the movement of the liquefied solder sphere after it has exited the exit orifice of the capillary tube, and applying a second laser pulse to reflow the solder sphere to create the solder joint between the first and second components.
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