Patent ID: 6605472
Filing Date: 2003-08-12
Classification: B01L,G01N,Y10T

Abstract:
A method of joining a capillary tube to a microchip including at least one capillary channel that opens onto an edge surface at the microchip, the method comprising the steps of:(1) drilling a flat-bottomed hole into the edge surface of the microchip with a conically tipped drill bit, to form a hole with a conical bottom, and removing the conical end face of the hole with a flat tipped drill bit having the same diameter as the first mentioned drill bit, the hole being axially aligned with the channel; and (2) inserting an end of a capillary tube into the hole, abutting the capillary tube against the flat bottom, said capillary tube also being axially aligned with the channel, and bonding the capillary tube to the microchip; so as to minimize dead volume between said capillary tube and said capillary channel.