International Business Machines Corporation

Bernie Hernandez

Raymond R Horton

Michael J Palmer

Frederick G Weindelmayer

Peter Alfred Gruber

Arthur R Zingher

Thomas George Ference

Egon Max Kummer

An apparatus and method utilize vacuum injected molding of a liquid in a plurality of mold cells for solidification therein. An injection head includes spaced apart vacuum and injection slots positionable atop a mold plate in flow communication with the mold cells therein. Relative axial sliding is effected between the injection head and the mold plate for sequentially evacuating gas from the mold cells using a continuous vacuum followed in turn by sequentially injecting into the evacuated mold cells the liquid from a continuous source thereof. Sliding of the injection head over the mold plate automatically provides self valving for sequentially evacuating and filling the mold cells from the same side of the mold plate. In a preferred embodiment, the vacuum and injection slots are linked together at the mold plate so that surface tension of the liquid restrains flow of the liquid from the injection slot to the vacuum slot while allowing gas flow therebetween for effecting the vacuum in the mold cells.

Apparatus and method for vacuum injection molding

A castellated nozzle for connecting a plurality of microelectronic leads to an associated plurality of contact pads and method of using the same. The castellated nozzle includes a body having a plurality of castellations protruding therefrom, with each of the castellations having a contact surface thereon. A channel is formed adjacent to at least one castellation of the plurality of castellations. An opening extends through the body for introducing a heated gas therein. The contact surfaces of the plurality of castellations are aligned to a respective plurality of leads. Typically, the castellated nozzle includes a first plurality of castellations forming a first row and a second plurality of castellations forming a second row.

Castellated nozzle and method of use thereof

A castellated nozzle for connecting a plurality of microelectronic leads to an associated plurality of contact pads and method of using the same. The castellated nozzle includes a body having a plurality of castellations protruding therefrom, with each of the castellations having a contact surface thereon. A channel is formed adjacent to at least one castellation of the plurality of castellations. An opening extends through the body for introducing a heated gas therein. The contact surfaces of the plurality of castellations are aligned to a respective plurality of leads. Typically, the castellated nozzle includes a first plurality of castellations forming a first row and a second plurality of castellations forming a second row. A channel is formed adjacent to at least one castellation. The first and second plurality of castellations are arranged in a staggered format wherein at a first point along the length of the opening one of the castellations in the first row is located opposite to one of the channels of the second row, and wherein at a second point along the length of the opening one of the channels in the first row is located opposite to one of the castellations in the second row. An opening is formed between the first and second row. The castellated nozzle includes a hole for aligning the castellated nozzle to a flexible circuit carrier.

Castellated nozzle and method of use therof

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Norwack, CT, United States of America

Bernie Hernandez