Abstract: A package includes a device die, a through-via having a sand timer profile, and a molding material molding the device die and the through-via therein, wherein a top surface of the molding material is substantially level with a top surface of the device die. A dielectric layer overlaps the molding material and the device die. A plurality of redistribution lines (RDLs) extends into the dielectric layer to electrically couple to the device die and the through-via.

Abstract: A package includes a device die, a through-via having a sand timer profile, and a molding material molding the device die and the through-via therein, wherein a top surface of the molding material is substantially level with a top surface of the device die. A dielectric layer overlaps the molding material and the device die. A plurality of redistribution lines (RDLs) extends into the dielectric layer to electrically couple to the device die and the through-via.

Abstract: A package includes a device die, a through-via having a sand timer profile, and a molding material molding the device die and the through-via therein, wherein a top surface of the molding material is substantially level with a top surface of the device die. A dielectric layer overlaps the molding material and the device die. A plurality of redistribution lines (RDLs) extends into the dielectric layer to electrically couple to the device die and the through-via.

Abstract: A package includes a device die, a through-via having a sand timer profile, and a molding material molding the device die and the through-via therein, wherein a top surface of the molding material is substantially level with a top surface of the device die. A dielectric layer overlaps the molding material and the device die. A plurality of redistribution lines (RDLs) extends into the dielectric layer to electrically couple to the device die and the through-via.

Abstract: A package includes a device die, a through-via having a sand timer profile, and a molding material molding the device die and the through-via therein, wherein a top surface of the molding material is substantially level with a top surface of the device die. A dielectric layer overlaps the molding material and the device die. A plurality of redistribution lines (RDLs) extends into the dielectric layer to electrically couple to the device die and the through-via.

Abstract: A package includes a device die, a through-via having a sand timer profile, and a molding material molding the device die and the through-via therein, wherein a top surface of the molding material is substantially level with a top surface of the device die. A dielectric layer overlaps the molding material and the device die. A plurality of redistribution lines (RDLs) extends into the dielectric layer to electrically couple to the device die and the through-via.

Abstract: A package structure includes a first substrate bonded to a second substrate by connecting metal pillars on the first substrate to connectors on the second substrate. A first metal pillar is formed overlying and electrically connected to a metal pad on a first region of the first substrate, and a second metal pillar is formed overlying a passivation layer in a second region of the first substrate. A first solder joint region is formed between metal pillar and the first connector, and a second solder joint region is formed between the second metal pillar and the second connector. The lateral dimension of the first metal pillar is greater than the lateral dimension of the second metal pillar.

Abstract: A package structure includes a first substrate bonded to a second substrate by connecting metal pillars on the first substrate to connectors on the second substrate. A first metal pillar is formed overlying and electrically connected to a metal pad on a first region of the first substrate, and a second metal pillar is formed overlying a passivation layer in a second region of the first substrate. A first solder joint region is formed between metal pillar and the first connector, and a second solder joint region is formed between the second metal pillar and the second connector. The lateral dimension of the first metal pillar is greater than the lateral dimension of the second metal pillar.

Abstract: Maintaining photoresist thickness and uniformity over a substrate that includes various cavities presents problems, such as preventing distortion of features in the resist image close to cavity edges. These problems have been overcome by laying down the photoresist as two separate layers. The first layer is used to eliminate or reduce problems associated with the presence of the cavities. The second layer is processed in the normal way and does not introduce distortions close to a cavity's edge. A first embodiment introduces some liquid into the cavity before laying down the first layer while the second embodiment etches away part of the first layer before applying the second one. Application of the process to the formation of a cantilever that overhangs a cavity is also described.

Abstract: Maintaining photoresist thickness and uniformity over a substrate that includes various cavities presents problems, such as preventing distortion of features in the resist image close to cavity edges. These problems have been overcome by laying down the photoresist as two separate layers. The first layer is used to eliminate or reduce problems associated with the presence of the cavities. The second layer is processed in the normal way and does not introduce distortions close to a cavity's edge. A first embodiment introduces some liquid into the cavity before laying down the first layer while the second embodiment etches away part of the first layer before applying the second one. Application of the process to the formation of a cantilever that overhangs a cavity is also described.