Abstract:
The present technology is directed to manufacturing semiconductor dies with under-bump metal (UBM) structures for die-to-die and/or package-to-package interconnects or other types of interconnects. In one embodiment, a method for forming under-bump metal (UBM) structures on a semiconductor die comprises constructing a UBM pillar by plating a first material onto first areas of a seed structure and depositing a second material over the first material. The first material has first electrical potential and the second material has a second electrical potential greater than the first electrical potential. The method further comprises reducing the difference in the electrical potential between the first material and the second material, and then removing second areas of the seed structure between the UBM pillars thereby forming UBM structures on the semiconductor die.
Abstract:
Semiconductor devices and device packages include at least one semiconductor die electrically coupled to a substrate through a plurality of conductive structures. The at least one semiconductor die may be a plurality of memory dice, and the substrate may be a logic die. An underfill material disposed between the at least one semiconductor die and the substrate may include a thermally conductive material. An electrically insulating material is disposed between the plurality of conductive structures and the underfill material. Methods of attaching a semiconductor die to a substrate, such as for forming semiconductor device packages, include covering or coating at least an outer side surface of conductive structures, electrically coupling the semiconductor die to the substrate with an electrically insulating material, and disposing a thermally conductive material between the semiconductor die and the substrate.
Abstract:
Method for packaging a semiconductor die assemblies. In one embodiment, a method is directed to packaging a semiconductor die assembly having a first die and a plurality of second dies arranged in a stack over the first die, wherein the first die has a peripheral region extending laterally outward from the stack of second dies. The method can comprise coupling a thermal transfer structure to the peripheral region of the first die and flowing an underfill material between the second dies. The underfill material is flowed after coupling the thermal transfer structure to the peripheral region of the first die such that the thermal transfer structure limits lateral flow of the underfill material.
Abstract:
Methods of processing a semiconductor device include attaching a semiconductor substrate to a carrier substrate, forming a silane material over an exposed portion of the carrier substrate, and curing the silane material to form a hydrophobic coating over the carrier substrate. The hydrophobic coating may reduce or prevent undercut of the semiconductor substrate due to wicking of adhesive from between the semiconductor substrate and the carrier substrate during processing. The silane material includes a compound having a chemical formula of (XO)3Si(CH2)nY, (XO)2Si((CH2)nY)2, or (XO)3Si(CH2)nY(CH2)nSi(XO)3, wherein XO is a hydrolyzable alkoxy group, Y is an organofunctional group, and n is a nonnegative integer. Some methods include forming a silane material over an exposed portion of a substrate, attaching a semiconductor device stack over the substrate, and forming an underfill material between substrates of the semiconductor device stack. Related structures are also disclosed.
Abstract:
Semiconductor assemblies, structures, and methods of fabrication are disclosed. A coating is formed on an electrically conductive pillar. The coating, which may be formed from at least one of a silane material and an organic solderability protectant material, may bond to a conductive material of the electrically conductive pillar and, optionally, to other metallic materials of the electrically conductive pillar. The coating may also bond to substrate passivation material, if present, or to otherwise-exposed surfaces of a substrate and a bond pad. The coating may be selectively formed on the conductive material. Material may not be removed from the coating after formation thereof and before reflow of the solder for die attach. The coating may isolate at least the conductive material from solder, inhibiting solder wicking or slumping along the conductive material and may enhance adhesion between the resulting bonded conductive element and an underfill material.
Abstract:
Methods of forming a semiconductor structure include exposing a carrier substrate to a silane material to form a coating, removing a portion of the coating at least adjacent a periphery of the carrier substrate, adhesively bonding another substrate to the carrier substrate, and separating the another substrate from the carrier substrate. The silane material includes a compound having a structure of (XO)3Si(CH2)nY, (XO)2Si((CH2)nY)2, or (XO)3Si(CH2)nY(CH2)nSi(XO)3, wherein XO is a hydrolyzable alkoxy group, Y is an organofunctional group, and n is a nonnegative integer. Some methods include forming a polymeric material comprising Si—O—Si over a first substrate, removing a portion of the polymeric material, and adhesively bonding another substrate to the first substrate. Structures include a polymeric material comprising Si—O—Si disposed over a first substrate, an adhesive material disposed over the first substrate and at least a portion of the polymeric material, and a second substrate disposed over the adhesive material.
Abstract:
Methods of forming a semiconductor structure include exposing a carrier substrate to a silane material to form a coating, removing a portion of the coating at least adjacent a periphery of the carrier substrate, adhesively bonding another substrate to the carrier substrate, and separating the another substrate from the carrier substrate. The silane material includes a compound having a structure of (XO)3Si(CH2)nY, (XO)2Si((CH2)nY)2, or (XO)3Si(CH2)nY(CH2)nSi(XO)3, wherein XO is a hydrolyzable alkoxy group, Y is an organofunctional group, and n is a nonnegative integer. Some methods include forming a polymeric material comprising Si—O—Si over a first substrate, removing a portion of the polymeric material, and adhesively bonding another substrate to the first substrate. Structures include a polymeric material comprising Si—O—Si disposed over a first substrate, an adhesive material disposed over the first substrate and at least a portion of the polymeric material, and a second substrate disposed over the adhesive material.
Abstract:
Semiconductor devices and device packages include at least one semiconductor die electrically coupled to a substrate through a plurality of conductive structures. The at least one semiconductor die may be a plurality of memory dice, and the substrate may be a logic die. An underfill material disposed between the at least one semiconductor die and the substrate may include a thermally conductive material. An electrically insulating material is disposed between the plurality of conductive structures and the underfill material. Methods of attaching a semiconductor die to a substrate, such as for forming semiconductor device packages, include covering or coating at least an outer side surface of conductive structures, electrically coupling the semiconductor die to the substrate with an electrically insulating material, and disposing a thermally conductive material between the semiconductor die and the substrate.
Abstract:
A method for selective removing material from a substrate without damage to copper filling a via and extending at least partially through the substrate. The method comprises oxidizing a semiconductor structure comprising a substrate and at least one copper feature and removing a portion of the substrate using an etchant comprising SF6 without forming copper sulfide on the at least one copper feature. Additional methods are also disclosed, as well as semiconductor structures produced from such methods.
Abstract:
Solid state lighting devices having side reflectivity and associated methods of manufacturing are disclosed herein. In one embodiment, a method of forming a solid state lighting device includes attaching a solid state emitter to a support substrate, mounting the solid state emitter and support substrate to a temporary carrier, and cutting kerfs through the solid state emitter and the substrate to separate individual dies. The solid state emitter can have a first semiconductor material, a second semiconductor material, and an active region between the first and second semiconductor materials. The individual dies can have sidewalls that expose the first semiconductor material, active region and second semiconductor material. The method can further include applying a reflective material into the kerfs and along the sidewalls of the individual dies.