Ink jet printheads of the type manufactured using micro-electromechanical systems technology have been proposed in a construction using nozzle chambers formed in layers on the top of a substrate with nozzle chambers formed in the layers. Each chamber is provided with a movable paddle actuated by some form of actuator to force ink in a drop through the nozzle associated with the chamber upon receipt of an electrical signal to the actuator. Such a construction is typified by the disclosure in International Patent Application PCT/AU99/00894 to the Applicant.
The present invention stems from the realisation that there are advantages to be gained by dispensing with the paddles and causing ink drops to be forced from the nozzle by decreasing the size of the nozzle chamber. It has been realisedexperts say, could be to give China an edge in any confrontation as well as speeding deployment of advanced military technology that will cost it billions less to develop, defense experts say.

The unclassified version of the Defense Science Board report entitled, “Resilient Military Systems and the Advanced Cyber Threat,” which did not contain the list and barely mentions China, was released in January. But defense officials, speaking anonymously, told the Post that Chinese hackers are behind the attacks on most of the systems on the list in the restricted version.

“The Defense Science Board, a senior advisory group made up of government and civilian experts, did not accuse the Chinese of stealing the designs,” the newspaper reported. “But senior military and industry officials with knowledge of the breaches said