Implementing reworkable strain relief packaging structure for electronic component interconnects
AssigneeInternational Business Machines Corporation
InventorMark K. Hoffmeyer
Life of this patent
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Abstract
A method and structure are provided for implementing enhanced reworkable strain relief packaging for electronic component interconnects. A plurality of custom strain relief pads is provided with a component footprint wiring layout on a component carrier or a component. The custom strain relief pads are disposed at component body perimeter locations. A solder mask is applied around these pad locations to provide a constrained area for a fusible surface coating. A fusible surface coating material is applied in the to the custom strain relief pads in the constrained area and then soldering of components is performed. Then a structural adhesive material is applied to the custom strain relief pad locations.
Claims11
A method for implementing enhanced reworkable strain relief packaging for electronic component interconnects, the method comprising:
- providing a component carrier;
- providing, on the component carrier, a ball grid array (BGA) module footprint and further providing, at corner locations corresponding to corners of a placed BGA component, a plurality of first custom corner pads, the BGA module footprint positioned within the plurality of first custom corner pads;
- providing, on the BGA component, at locations corresponding to the corner locations, a plurality of second custom corner pads;
- applying a solder mask around the plurality of first custom corner pads and around the plurality of second custom corner pads, the solder mask providing a first constrained area and a second constrained area, respectively;
- depositing a fusible layer onto the plurality of first and the plurality of second custom corner pads, the fusible layer selected to have a melting temperature less than a melting temperature of solder used in BGA component solder joints formed between the BGA component and the component carrier;
- placing a solder paste onto BGA ball attach pads included in the BGA module footprint;
- placing the BGA component onto the component carrier so that solder attach balls of the BGA component contact the solder paste on the BGA ball attach pads;
- soldering the BGA component to the component carrier;
- and
- depositing a structural adhesive material onto the plurality of first and onto the plurality of second custom corner pads.
A method for implementing enhanced reworkable strain relief packaging for electronic component interconnects, the method comprising:
- providing a BGA component;
- providing a component carrier;
- providing, at corner locations corresponding to corners of a placed BGA component on the component carrier, a plurality of first custom corner pads, and further providing on the component carrier, a ball grid array (BGA) module footprint, the BGA module footprint positioned within the plurality of first custom corner pads;
- providing, at locations on the BGA component corresponding to the corner locations, a plurality of second custom corner pads;
- applying a solder mask around the plurality of first custom corner pads and around the plurality of second custom corner pads, the solder mask providing a first constrained area and a second constrained area, respectively;
- depositing a fusible layer onto the plurality of first and the plurality of second custom corner pads, the fusible layer selected to have a melting temperature less than a melting temperature of solder used in BGA component solder joints formed between the BGA component and the component carrier;
- placing a solder paste onto BGA ball attach pads included in the BGA module footprint;
- placing the BGA component onto the component carrier so that solder attach balls of the BGA component contact the solder paste on the BGA ball attach pads;
- soldering the BGA component to the component carrier;
- and
- depositing a structural adhesive material onto the plurality of first and onto the plurality of second custom corner pads.
Dependencies are inferred from the claim text.