摘要:
A method includes heating a package structure including a first work piece and a second work piece to melt a plurality of solder bumps between the first and the second work pieces; and after the step of heating, allowing the plurality of solder bumps to solidify. During the step of solidifying, a first side of the package structure is maintained at a first temperature higher than a melting temperature of the plurality of solder bumps by using a heating source. During the step of solidifying, a second side of the package structure is maintained at a second temperature lower than the melting temperature by using a cooling source, wherein the second side is opposite the first side.
摘要:
A method includes heating a package structure including a first work piece and a second work piece to melt a plurality of solder bumps between the first and the second work pieces; and after the step of heating, allowing the plurality of solder bumps to solidify. During the step of solidifying, a first side of the package structure is maintained at a first temperature higher than a melting temperature of the plurality of solder bumps by using a heating source. During the step of solidifying, a second side of the package structure is maintained at a second temperature lower than the melting temperature by using a cooling source, wherein the second side is opposite the first side.
摘要:
An under-bump metallization (UBM) structure in a semiconductor device includes a copper layer, a nickel layer, and a Cu—Ni—Sn intermetallic compound (IMC) layer between the copper layer and the nickel layer.
摘要:
A device includes a first package component, and a second package component underlying, and bonded to, the first package component. A molding material is disposed under the first package component and molded to the first and the second package components, wherein the molding material and the first package component form an interface. An isolation region includes a first edge, wherein the first edge of the isolation region contacts a first edge of the first package component and a first edge of the molding material. The isolation has a bottom lower than the interface.
摘要:
A device includes a first package component, and a second package component underlying, and bonded to, the first package component. A molding material is disposed under the first package component and molded to the first and the second package components, wherein the molding material and the first package component form an interface. An isolation region includes a first edge, wherein the first edge of the isolation region contacts a first edge of the first package component and a first edge of the molding material. The isolation has a bottom lower than the interface.
摘要:
A filler composition for welding onto a substrate is composed of 82.5˜96.5 wt %, aluminum, 3.0˜10.0 wt % copper, 0.2˜1.5 wt % magnesium, 0.1˜1.5 wt % silver, 0.1˜2.0 wt % scandium, 0˜1.5 wt % zirconium, and 0˜1.0 wt % titanium, and can be welded with a high success rate to a substrate (such as an aluminum-copper alloy substrate) and avoiding a hot cracking phenomenon and a low welding strength, so as to achieve the effects of enhancing the yield rate and lowering the cost of a product.
摘要:
A device includes a first and a second package component. A metal trace is disposed on a surface of the first package component. The metal trace has a lengthwise direction. The metal trace includes a portion having an edge, wherein the edge is not parallel to the lengthwise direction of the metal trace. The second package component includes a metal pillar, wherein the second package component is disposed over the first package component. A solder region bonds the metal pillar to the metal trace, wherein the solder region contacts a top surface and the edge of the portion of the metal trace.
摘要:
The embodiments of bump and bump-on-trace (BOT) structures provide bumps with recess regions for reflowed solder to fill. The recess regions are placed in areas of the bumps where reflow solder is most likely to protrude. The recess regions reduce the risk of bump to trace shorting. As a result, yield can be improved.
摘要:
A device includes a first and a second package component. A metal trace is disposed on a surface of the first package component. The metal trace has a lengthwise direction. The metal trace includes a portion having an edge, wherein the edge is not parallel to the lengthwise direction of the metal trace. The second package component includes a metal pillar, wherein the second package component is disposed over the first package component. A solder region bonds the metal pillar to the metal trace, wherein the solder region contacts a top surface and the edge of the portion of the metal trace.