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Oberson
Valerie Oberson, Granby CA
| Patent application number | Description | Published |
|---|---|---|
| 20100175790 | New Flux Composition and Process For Use Thereof - The invention relates to a composition of matter comprising a soldering flux, wherein the flux consists essentially of a combination of a fluxing agent and a solvent, and wherein the fluxing agent comprises a keto acid such as levulinic acid or acetylbutyric acid. The flux may also comprises an ester acid, or comprises a mixture of the keto acid with the ester acid. The solvent comprises a mixture of a tacky solvent with a non-tacky solvent. The invention also relates to a process comprising soldering at least two surfaces together, each of which comprises a metal area to which solder can adhere by employing the following steps in any order: applying solder to at least one of the metal areas, aligning the metal areas so that they are superimposed over one another, heating at least one of the areas to a temperature that comprises at least the melting temperature of the solder. The last step comprises joining the superimposed areas to one another. The process employs the flux composition operatively associated with the solder, and in one embodiment the invention comprises a mixture of the flux composition with powdered solder. In another embodiment, the process comprises IMS, C4 and C4NP processes and the solder comprises a lead free solder. The invention also comprises a product produced by the foregoing process or processes. | 07-15-2010 |
Valerie Oberson, Quebec CA
| Patent application number | Description | Published |
|---|---|---|
| 20090039140 | Solder Mold With Venting Channels - A solder mold for transferring solder to a wafer includes a substrate, a plurality of solder cavities for holding solder, and a plurality of ventilation channels formed between the plurality of solder cavities. | 02-12-2009 |
| 20090039142 | Method for Forming a Solder Mold with Venting Channels and Method for Using the Same - A method for forming a solder mold for transferring solder to a wafer includes etching a plurality of solder cavities into a substrate. A plurality of ventilation channels are etched on the substrate connecting the plurality of solder cavities. | 02-12-2009 |
Valerie A. Oberson, Alphonse De Granby CA
| Patent application number | Description | Published |
|---|---|---|
| 20100193949 | NOVEL STRUCTURE OF UBM AND SOLDER BUMPS AND METHODS OF FABRICATION - Methods and UBM structures having bilayer or trilayer UBM layers that include a thin TiW adhesion layer and a thick Ni-based barrier layer thereover both deposited under sputtering operating conditions that provide the resultant bilayer or trilayer UBM layers with minimal composite stresses. The Ni-based barrier layer may be pure Ni or a Ni alloy. These UBM layers may be patterned to fabricate bilayer or trilayer UBM capture pads, followed by joining a lead-free solder thereto for providing lead-free solder joints that maintain reliability after multiple reflows. Optionally, the top layer of the trilayer UBM structures may include soluble or insoluble metals for doping the lead-free solder connections. | 08-05-2010 |
Valerie A. Oberson, Quebec CA
| Patent application number | Description | Published |
|---|---|---|
| 20090266447 | OPTIMIZATION OF METALLURGICAL PROPERTIES OF A SOLDER JOINT - Semiconductor packaging techniques are provided which optimize metallurgical properties of a joint using dissimilar solders. A solder composition for Controlled Collapse Chip Connection processing includes a combination of a tin based lead free solder component designed for a chip and a second solder component designed for a laminate. The total concentration of module Ag after reflow is less than 1.9% by weight. A method of manufacturing a solder component is also provided. | 10-29-2009 |
Valérie Anne Oberson, St-Alphonse De Granby CA
| Patent application number | Description | Published |
|---|---|---|
| 20100062597 | Interconnection for flip-chip using lead-free solders and having improved reaction barrier layers - An interconnection structure suitable for flip-chip attachment of microelectronic device chips to packages, comprising a two, three or four layer ball-limiting metallurgy including an adhesion/reaction barrier layer, and having a solder wettable layer reactive with components of a tin-containing lead free solder, so that the solderable layer can be totally consumed during soldering, but a barrier layer remains after being placed in contact with the lead free solder during soldering. One or more lead-free solder balls is selectively situated on the solder wetting layer, the lead-free solder balls comprising tin as a predominant component and one or more alloying components. | 03-11-2010 |
Valérie Anne Oberson, St-Alphonse De Granby CA
| Patent application number | Description | Published |
|---|---|---|
| 20100062597 | Interconnection for flip-chip using lead-free solders and having improved reaction barrier layers - An interconnection structure suitable for flip-chip attachment of microelectronic device chips to packages, comprising a two, three or four layer ball-limiting metallurgy including an adhesion/reaction barrier layer, and having a solder wettable layer reactive with components of a tin-containing lead free solder, so that the solderable layer can be totally consumed during soldering, but a barrier layer remains after being placed in contact with the lead free solder during soldering. One or more lead-free solder balls is selectively situated on the solder wetting layer, the lead-free solder balls comprising tin as a predominant component and one or more alloying components. | 03-11-2010 |