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US 5,980,270 AGranted
Soldering with resilient contacts
AssigneeTessera, Inc.
InventorsJoseph Fjelstad, Thomas H. DiStefano, John W. Smith
Life of this patent
Estimating the term…
Abstract
A method of making a solder connection. An element bearing a solder mass is forcibly engaged with another element bearing a resilient metallic contact so that the contact wipes the surface of the solder mass and so that the contact is deformed and bears against the wiped surface. While the contact is in its deformed condition, the contact and solder mass are brought to an elevated bonding temperature sufficient to soften the solder, so that the contact penetrates into the solder mass under the influence of its own resilience. The contact bonds with the pure solder inside the solder mass, so that the effective bonding can be achieved even without flux.
Claims34
An electrically connected article comprising:
- (a) a first element having a structure with at least one terminal thereon and a mass of a bonding material adhering to said terminal, said bonding material mass having an outer surface;
- and
- (b) a second element including a body having one or more openings therein and one or more contacts thereon, each said contact including an anchor portion secured to said body adjacent one of said openings and at least one tab projecting from such anchor portion and having a distal end remote from the anchor portion overlying said opening within said body, the distal end of each said tab penetrating said outer surface of one said mass of bonding material on the first element in alignment with said opening in said body and being bonded thereto.
An electrically connected article comprising:
- (a) a first element having a structure with at least one terminal thereon and a mass of a bonding material adhering to said terminal, said bonding material mass having an outer surface;
- and
- (b) a second element having a body with one or more contacts thereon, each said contact including an anchor portion secured to said body, an opening and at least one tab projecting from such anchor portion and having a distal end remote from the anchor portion and extending into said opening, the distal end of each said tab penetrating said outer surface of one said mass of bonding material on the first element and being bonded thereto.
An electrically connected article comprising:
- (a) a first element having a structure with at least one terminal thereon and a mass of a bonding material adhering to said terminal, said bonding material mass having an outer surface;
- and
- (b) a second element having a body with one or more contacts thereon, each said contact including an anchor portion secured to said body and at least one tab projecting from such anchor portion and having a distal end remote from the anchor portion, the distal end of each said tab penetrating said outer surface of one said mass of bonding material on the first element when the temperature of said mass is substantially below its melting temperature and then penetrating into said mass upon heating said mass to a temperature sufficient to soften said mass for bonding said distal end thereto, wherein said body includes an opening and said tab being resilient whereby said distal end of each said tab is deflected into said opening within said body upon initial engagement with said mass of bonding material.
An electrically connected article comprising:
- (a) a microelectronic element having a structure with at least one terminal thereon and a mass of a bonding material adhering to said terminal, said bonding material mass having an outer surface;
- (b) a connector body;
- and
- (c) one or more contacts on said connector body, each said contact including an anchor portion secured to said body and at least one tab projecting from such anchor portion and having a distal end remote from the anchor portion, the distal end of each said tab penetrating said outer surface of one said mass of bonding material on the first element and being bonded thereto, wherein said distal end of each said tab is deflected in a direction transverse to a plane containing said anchor portion upon engagement with said mass of bonding material.
1 more element
An electrically connected article comprising:
- (a) a microelectronic element having a structure with at least one terminal thereon and a mass of a bonding material adhering to said terminal, said bonding material mass having an outer surface;
- (b) a connector body having one or more openings therein;
- and
- (c) one or more contacts on said connector body adjacent one of said openings, each said contact including an anchor portion secured to said body and at least one tab projecting from such anchor portion and having a distal end remote from the anchor portion overlying said opening in said body, the distal end of each said tab penetrating said outer surface of one said mass of bonding material on the first element in alignment with said opening in said body when the temperature of said mass is substantially below its melting temperature and then penetrating into said mass upon heating said mass to a temperature sufficient to soften said mass for bonding said distal end thereto.
1 more element
An electrically connected article comprising:
- (a) a first element having a structure with at least one terminal thereon and a mass of a bonding material adhering to said terminal, said bonding material mass having an outer surface;
- and
- (b) a second element having a body with one or more contacts thereon, each said contact including an anchor portion secured to said body and at least one tab projecting from such anchor portion and having a distal end remote from the anchor portion, the distal end of each said tab penetrating said outer surface of one said mass of bonding material on the first element when the temperature of said mass is substantially below its melting temperature and then penetrating into said mass upon heating said mass to a temperature sufficient to soften said mass for bonding said distal end thereto, wherein said distal end of each said tab is deflected in a direction transverse to a plane containing the remaining portion of said tab upon engagement with said mass of bonding material.
Dependencies are inferred from the claim text.