Bump on pad (BOP) bonding structure in semiconductor packaged device
First Claim
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1. A package structure comprising:
- an integrated circuit package comprising a conductive post, the conductive post having a first racetrack shape in a plan view;
a substrate bonded to the integrated circuit package, the substrate comprising;
a first contact pad having a second racetrack shape in the plan view, a line extending through a first center of the first racetrack shape and a second center of the second racetrack shape intersecting the conductive post at an angle different from 90 degrees; and
a first dielectric layer over the first contact pad; and
a solder layer extending through the first dielectric layer, the solder layer electrically and mechanically coupling the conductive post to the first contact pad.
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Abstract
The embodiments described above provide enlarged overlapping surface areas of bonding structures between a package and a bonding substrate. By using elongated bonding structures on either the package and/or the bonding substrate and by orienting such bonding structures, the bonding structures are designed to withstand bonding stress caused by thermal cycling to reduce cold joints.
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Citations
20 Claims
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1. A package structure comprising:
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an integrated circuit package comprising a conductive post, the conductive post having a first racetrack shape in a plan view; a substrate bonded to the integrated circuit package, the substrate comprising; a first contact pad having a second racetrack shape in the plan view, a line extending through a first center of the first racetrack shape and a second center of the second racetrack shape intersecting the conductive post at an angle different from 90 degrees; and a first dielectric layer over the first contact pad; and a solder layer extending through the first dielectric layer, the solder layer electrically and mechanically coupling the conductive post to the first contact pad. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A package structure comprising:
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a die package comprising a conductive post, the conductive post having a first racetrack shape in a plan view; a substrate bonded to the die package, the substrate comprising; a contact pad having a second racetrack shape in the plan view, a first center of the first racetrack shape being laterally spaced apart from a second center of the second racetrack shape; and a solder resist layer over the contact pad; and a solder layer extending through the solder resist layer, the solder layer being in physical contact with the conductive post and the contact pad. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A package structure comprising:
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a die package comprising a first conductive post and a second conductive post, the first conductive post having a first racetrack shape in a plan view, the second conductive post having a second racetrack shape in the plan view, a center of the first racetrack shape being laterally spaced apart from a center of the die package by a first distance, a center of the second racetrack shape being laterally spaced apart from the center of the die package by a second distance, the second distance being different from the first distance; a substrate bonded to the die package, the substrate comprising; a first contact pad and a second contact pad, the first contact pad having a third racetrack shape in the plan view, the second contact pad having a fourth racetrack shape in the plan view; and a passivation layer over the first contact pad and the second contact pad; a first solder layer extending through the passivation layer, the first solder layer electrically and mechanically coupling the first conductive post to the first contact pad, a center of the third racetrack shape being laterally spaced apart from the center of the die package by a third distance, the third distance being greater than the first distance; and a second solder layer extending through the passivation layer, the second solder layer electrically and mechanically coupling the second conductive post to the second contact pad, a center of the fourth racetrack shape being laterally spaced apart from the center of the die package by a fourth distance, the fourth distance being greater than the second distance, a difference between the third distance and the first distance being different from a difference between the fourth distance and the second distance. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification