AN ELECTRICAL INTERCONNECTION SYSTEM
Original Publication Date: 1983-Feb-28
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
One type of an ink jet printing machine has an array of small nozzles operatively associated with an electromechanical transducer defining a chamber having ink therein. Upon excitation, the electromechanical transducer varies the volume of the chamber producing a temporary increase in pressure on the ink. This forces a droplet of ink to be ejected from a corresponding nozzle. These individual droplets of ink are sprayed onto a copy sheet. It is frequently difficult to make the required number of electrical connections to the ink jet transducers where adjacent transducers are in close proximity to one another. A portion of an ink jet module is shown in the drawing. By way of example, 20 tubular piece or transducer 24 are depicted in aperture 62 in circuit board 26. Circuit board 26 consists of an insulating board. 60, which forms two opposed planar surfaces. Preferably, insulating board 60 is made from an epoxy glass substrate about 0.062 inches in thickness. Traces 28 are bonded on opposed surfaces of insulating material 60. Preferably, traces 28 are made from copper, of about 0.0015 inches in thickness, and having a lead-tin solder of about 0.0003 inches in thickness plated thereover.