摘要:
Structures and a method for forming the same. The structure includes a semiconductor substrate, a transistor on the semiconductor substrate, and N interconnect layers on top of the semiconductor substrate, N being a positive integer. The transistor is electrically coupled to the N interconnect layers. The structure further includes a first dielectric layer on top of the N interconnect layers and P crack stop regions on top of the first dielectric layer, P being a positive integer. The structure further includes a second dielectric layer on top of the first dielectric layer. Each crack stop region of the P crack stop regions is completely surrounded by the first dielectric layer and the second dielectric layer. The structure further includes an underfill layer on top of the second dielectric layer. The second dielectric layer is sandwiched between the first dielectric layer and the underfill layer.
摘要:
Structures and a method for forming the same. The structure includes a semiconductor substrate, a transistor on the semiconductor substrate, and N interconnect layers on top of the semiconductor substrate, N being a positive integer. The transistor is electrically coupled to the N interconnect layers. The structure further includes a first dielectric layer on top of the N interconnect layers and P crack stop regions on top of the first dielectric layer, P being a positive integer. The structure further includes a second dielectric layer on top of the first dielectric layer. Each crack stop region of the P crack stop regions is completely surrounded by the first dielectric layer and the second dielectric layer. The structure further includes an underfill layer on top of the second dielectric layer. The second dielectric layer is sandwiched between the first dielectric layer and the underfill layer.
摘要:
A chip fabrication method. A provided structure includes: a transistor on a semiconductor substrate, N interconnect layers on the semiconductor substrate and the transistor (N>0), and a first dielectric layer on the N interconnect layers. The transistor is electrically coupled to the N interconnect layers. P crack stop regions and Q crack stop regions are formed on the first dielectric layer (P, Q>0). The first dielectric layer is sandwiched between the N interconnect layers and a second dielectric layer that is formed on the first dielectric layer. Each P crack stop region is completely surrounded by the first and second dielectric layers. The second dielectric layer is sandwiched between the first dielectric layer and an underfill layer that is formed on the second dielectric layer. Each Q crack stop region is completely surrounded by the first dielectric layer and the underfill layer.
摘要:
A chip fabrication method. A provided structure includes: a transistor on a semiconductor substrate, N interconnect layers on the semiconductor substrate and the transistor (N>0), and a first dielectric layer on the N interconnect layers. The transistor is electrically coupled to the N interconnect layers. P crack stop regions and Q crack stop regions are formed on the first dielectric layer (P, Q>0). The first dielectric layer is sandwiched between the N interconnect layers and a second dielectric layer that is formed on the first dielectric layer. Each P crack stop region is completely surrounded by the first and second dielectric layers. The second dielectric layer is sandwiched between the first dielectric layer and an underfill layer that is formed on the second dielectric layer. Each Q crack stop region is completely surrounded by the first dielectric layer and the underfill layer.
摘要:
In one embodiment of the present invention, inert nano-sized particles having dimensions from 1 nm to 1,000 nm are added into a solder ball. The inert nano-sized particles may comprise metal oxides, metal nitrides, metal carbides, metal borides, etc. The inert nano-sized particles may be a single compound, or may be a metallic material having a coating of a different material. In another embodiment of the present invention, a small quantity of at least one elemental metal that forms stable high melting intermetallic compound with tin is added to a solder ball. The added at least one elemental metal forms precipitates of intermetallic compounds with tin, which are dispersed as fine particles in the solder.
摘要:
A silicon based package (SBP) is formed starting with a thick wafer, which serves as the base for the SBP, composed of silicon which has a first surface and a reverse surface which are planar. Then form an interconnection structure including multilayer conductor patterns over the first surface. Form a temporary bond between the SBP and a wafer holder, with the wafer holder being a rigid structure. Thin the wafer to a desired thickness to form an Ultra Thin Silicon Wafer (UTSW) for the SBP. Forming via holes which extend through the UTSW, forming metallization in the via holes which extends through the UTSW, making electrical contact to the interconnection structure on the first surface. Then bond the metallization in the via holes to pads of a carrier.
摘要:
A device for preventing short circuits between solder joints in flip chip packaging. The dielectric interposer has a plurality of apertures or vias which correspond to the I/O pads on a chip and substrate. Preferably, the interposer comprises a polyester film, glass, alumina, polyimide, a heat curable polymer or an inorganic powder filler in an organic material. More preferably, the interposer contains an adhesive or has adhesive layers disposed on the linear surfaces of the interposer. Cone shaped solder elements are formed within the apertures of the interposer. The dielectric interposer is positioned between a chip and substrate in an electronic module and thermally reflowed to create an electrical and mechanical interconnection. The interposer prohibits contact between the solder joints by isolating each of the joints and corresponding bonding pads. The interposer also prevents over compression of the solder joints by acting as a stand off.
摘要:
A method and apparatus are provided for forming an elongated solder joint between two soldered substrates of an electronic module or an electronic module in the process of being fabricated by using expandable solder bump means disposed between the substrates. The expandable solder bumps means comprise solder having a higher reflow temperature than the solder used to join the substrates and expansion means such as a compressed spring encased within the solder and are activated (expanded) by reflowing at a higher temperature than the melting point temperature of the solder joints.
摘要:
A flip chip assembly apparatus includes at least one warpage-suppressor assembly. Each warpage-suppressor assembly can include a side heater, a deformable material pad, and an actuator assembly for moving the side heater and the deformable material pad. Each side heater provides additional heat to peripheral solder balls during bonding of two substrates, thereby facilitating the reflow of the peripheral solder balls. Each deformable material pad contacts, and presses down on, a surface of one of the two substrates under bonding. The deformable material pad(s) can prevent or minimize warpage of the contacted substrate.
摘要:
Methods, apparatus and assemblies for enhancing heat transfer in electronic components using a flexible thermal pillow. The flexible thermal pillow has a thermally conductive material sealed between top and bottom conductive layers, with the bottom layer having a flexible reservoir residing on opposing sides of a central portion of the pillow that has a gap. The pillow may have roughened internal surfaces to increase an internal surface area within the pillow for enhanced heat dissipation. In an electronic assembly, the central portion of the pillow resides between a heat sink and heat-generating component for the thermal coupling there-between. During thermal cycling, the flexible reservoir of the pillow expands to retain thermally conductive material extruded from the gap, and then contracts to force such extruded material back into the gap. An external pressure source may contact the pillow for further forcing the extruded thermally conductive material back into the gap.