Metal working – Method of mechanical manufacture – Electrical device making
Patent
1999-03-01
2000-10-03
Gerrity, Stephen F.
Metal working
Method of mechanical manufacture
Electrical device making
29846, 427 97, H01K 310
Patent
active
061255319
ABSTRACT:
A method of making a circuitized substrate such as a printed circuit board having at least one hole therein which comprises the steps of providing a layer of dielectric, forming at least one (and preferably several) holes therein, providing a fill member including a quantity of fill material and reinforcement means located within the fill material, positioning the fill member on the dielectric over the holes and thereafter applying a predetermined force sufficient to cause only the fill material to be forcibly driven into the accommodating hole(s), not the reinforcement means. Subsequent steps can include forming a layer of circuitry on the substrate's external surface and over the filled holes such that an electrical component such as a ball grid array (BGA), semiconductor chip, etc. may be directly positioned on and/or over the hole(s). A fill member usable with the method is also provided.
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Farquhar Donald S.
Markovich Voya R.
Papathomas Kostas I.
Schmidt Leonard L.
Fraley Lawrence R.
Gerrity Stephen F.
International Business Machines - Corporation
Sands Rhonda E
LandOfFree
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