Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to heat the... – Electrical heating
Reexamination Certificate
2001-12-20
2004-09-28
Ortiz, Angela (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Direct application of electrical or wave energy to heat the...
Electrical heating
C264S104000, C264S267000
Reexamination Certificate
active
06797224
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to the field of placing fill materials into the vias or holes of an electronic substrate.
BACKGROUND OF THE INVENTION
A common structure in various electronics packages, such as laminate packages, wired circuit boards, ceramic substrates, and hybrid circuits, is a via or hole. A via or hole is a vertical opening which can be filled with conducting material used to connect circuits on various layers of a substrate or electronics packages to one another. Holes in certain devices may connect to a semi-conducting substrate. A hole generally starts as an empty cylindrical opening in an electronics package which is formed by drilling. The hole is then plated with an electrical conductor such as copper or tin. Plating may be done over the entire panel or device, or may be done with a pattern, dot, or button feature. The plating process results in a hole that is an opening with a plated, electrically conductive layer on the inner surface of the opening. Plating may also result in plating all or part of the surface of the device. Plating of the hole provides the primary electrical contact at the various layers within the device. The following step is to fill the hole with an electrically conductive, thermally conductive or nonconductive paste. The reasons for filling the hole after plating include providing a secondary or fail safe electrical connection, to provide structural integrity, to prevent chemical process entrapment from down-line operations, or to provide thermal conductivity to remove heat from the inner circuit layers of the resulting device. Another reason is that filling the hole also controls the breaking of electrical connections formed when the plate or finished electrical device thermally cycles between operating temperatures and non-operating temperatures.
Various methods relating to hole filling are discussed in pending U.S. patent application Ser. Nos. 09/752,629 and 09/752,503 which are directed to devices and methods for delivering a fill material using a delivery system that includes a pressurized supply of fill material and a pressure head attached to the pressurized supply of fill material.
SUMMARY OF THE INVENTION
The present invention is directed to a filling system includes a pressurized source of fill material and a pressure fill head wherein the fill head also includes a heating element positioned so as to transfer heat to fill material passing through the fill head. A method of filling holes using a fill material passing through a pressure fill head includes the steps of causing fill material to enter the fill head, modifying the viscosity of the fill material while it is within the fill head, and causing the modified viscosity fill material to exit the fill head and enter at least one hole.
Incorporation of a heating element into a pressure fill head may involve including a heating element that converts electrical energy into heat as part of the fill head, and/or pumping a heated material through a radiator that is part of the fill head.
Various objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments of the invention, along with the accompanying drawings in which like numerals represent like components.
REFERENCES:
patent: 3601523 (1971-08-01), Arndt et al.
patent: 4106187 (1978-08-01), Smith et al.
patent: 4283243 (1981-08-01), Andreades et al.
patent: 4360570 (1982-11-01), Andreades et al.
patent: 4498275 (1985-02-01), Baron
patent: 4622239 (1986-11-01), Schoenthaler et al.
patent: 4700474 (1987-10-01), Choinski
patent: 4777721 (1988-10-01), Choinski
patent: 4783247 (1988-11-01), Seibel
patent: 4884337 (1989-12-01), Choinski
patent: 4954313 (1990-09-01), Lynch
patent: 4964948 (1990-10-01), Reed
patent: 4995941 (1991-02-01), Nelson et al.
patent: 5053921 (1991-10-01), Nelson et al.
patent: 5058265 (1991-10-01), Goldfarb
patent: 5117069 (1992-05-01), Higgins, III
patent: 5133120 (1992-07-01), Kawakami et al.
patent: 5145691 (1992-09-01), Kawakami et al.
patent: 5220723 (1993-06-01), Okada
patent: 5274916 (1994-01-01), Kawabata et al.
patent: 5277854 (1994-01-01), Hunt
patent: 5332439 (1994-07-01), Watanabe et al.
patent: 5451721 (1995-09-01), Tsukada et al.
patent: 5456004 (1995-10-01), Swamy
patent: 5471091 (1995-11-01), Pasch et al.
patent: 5532516 (1996-07-01), Pasch et al.
patent: 5540779 (1996-07-01), Andris et al.
patent: 5578151 (1996-11-01), Andris et al.
patent: 5591353 (1997-01-01), Davignon et al.
patent: 5610103 (1997-03-01), Xu et al.
patent: 5637834 (1997-06-01), La Bate, Jr. et al.
patent: 5662987 (1997-09-01), Mizumoto et al.
patent: 5699613 (1997-12-01), Chong et al.
patent: 5707575 (1998-01-01), Litt et al.
patent: 5744171 (1998-04-01), Schneider
patent: 5744285 (1998-04-01), Felten et al.
patent: 5753976 (1998-05-01), Harvey
patent: 5761803 (1998-06-01), St. John et al.
patent: 5766670 (1998-06-01), Arldt et al.
patent: 5822856 (1998-10-01), Bhatt et al.
patent: 5824155 (1998-10-01), Ha et al.
patent: 5851344 (1998-12-01), Xu et al.
patent: 5887345 (1999-03-01), Kulesza et al.
patent: 5893404 (1999-04-01), Mendez et al.
patent: 5906042 (1999-05-01), Lan et al.
patent: 5925414 (1999-07-01), Buechele et al.
patent: 5994779 (1999-11-01), Gardner et al.
patent: 6000129 (1999-12-01), Bhatt et al.
patent: 6009620 (2000-01-01), Bhatt et al.
patent: 6015520 (2000-01-01), Appelt et al.
patent: 6079100 (2000-06-01), Farquhar et al.
patent: 6090474 (2000-07-01), Johansson et al.
patent: 6106891 (2000-08-01), Kulesza et al.
patent: 6134772 (2000-10-01), Arldt et al.
patent: 6138350 (2000-10-01), Bhatt et al.
patent: 6149857 (2000-11-01), McArdle et al.
patent: 6153508 (2000-11-01), Harvey
patent: 6184133 (2001-02-01), Iijima et al.
patent: 6261501 (2001-07-01), Miyagawa et al.
patent: 6264862 (2001-07-01), Liaw
patent: 6276055 (2001-08-01), Bryan et al.
patent: 6281488 (2001-08-01), Fleming
patent: 6282782 (2001-09-01), Biunno et al.
patent: 6398099 (2002-06-01), Liaw
patent: 6427325 (2002-08-01), Johansson et al.
patent: 6454154 (2002-09-01), Pedigo
patent: 6506332 (2003-01-01), Pedigo
patent: 0194247 (1986-09-01), None
patent: 0713358 (1995-05-01), None
patent: 0723388 (2002-07-01), None
patent: 2684836 (1991-12-01), None
patent: 2714567 (1995-06-01), None
patent: 2120017 (1983-11-01), None
patent: 2246912 (1992-02-01), None
patent: 2341347 (2000-03-01), None
patent: 53-10487 (1979-08-01), None
patent: 54-139065 (1979-10-01), None
patent: 58011172 (1983-01-01), None
patent: 62-277794 (1987-12-01), None
patent: 62-287696 (1987-12-01), None
patent: 1173696 (1989-07-01), None
patent: 1236694 (1989-09-01), None
patent: 04186792 (1992-07-01), None
patent: 04-24363 (1992-08-01), None
patent: 04239193 (1992-08-01), None
patent: 05275819 (1993-10-01), None
patent: 07176871 (1995-07-01), None
patent: 08172265 (1996-07-01), None
patent: 08191184 (1996-07-01), None
patent: 09321399 (1997-12-01), None
patent: 10256687 (1998-09-01), None
patent: 10281391 (1998-10-01), None
patent: 11054909 (1999-02-01), None
patent: 10065339 (1999-03-01), None
patent: WO 86/06243 (1986-10-01), None
Meyer Timothy
Pedigo Jesse
Greenberg & Traurig, LLP
Krietzman, Esq. Mark
Ortiz Angela
TTM Advanced Technologies, Inc.
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