摘要:
A microelectronic assembly (10, 110, 210, 310, 410) includes a first substrate (12, 112, 212, 312, 412, 512, 612, 712, 812, 912) having a first conductive element (26, 126, 226, 326, 426, 526, 626, 726, 826, 926, 1022) and a second substrate (14, 114, 214, 314, 414) having a second conductive element (26, 126, 226, 326, 426). The assembly further includes an electrically conductive alloy mass (16, 116) joined to the first and second conductive elements (26, 126, 226, 326, 426, 526, 626, 726, 826, 926, 1022), including a first, a second and a third material. First and second materials of the alloy mass (16, 116) each have a melting point lower than a melting point of the alloy. A concentration of the first material varies in concentration from a relatively higher amount at a location disposed toward the first conductive element (26, 126, 226, 326, 426, 526, 626, 726, 826, 926, 1022) to a relatively lower amount toward the second conductive element (26, 126, 226, 326, 426), and a concentration of the second material varies in concentration from a relatively higher amount at a location disposed toward the second conductive element (26, 126, 226, 326, 426) to a relatively lower amount toward the first conductive element (26, 126, 226, 326, 426, 526, 626, 726, 826, 926, 1022). The microelectronic assembly (10, 110, 210, 310, 410) is formed by aligning the first substrate (12, 112, 212, 312, 412, 512, 612, 712, 812, 912), having a first bond component (30, 230, 330, 430), with the second substrate (14, 114, 214, 314, 414), having a second bond component (40, 240, 340, 440), such that the first (30, 230, 330, 430, 1030) and second (40, 240, 340, 440) bond components are in contact with each other, the first bond component (30, 230, 330, 430, 1030) including a first material layer (36, 536, 636, 736, 836, 936) adjacent the first conductive element (26, 126, 226, 326, 426, 526, 626, 726, 826, 926, 1022) and a first protective layer (38, 538, 638, 738, 838, 938) overlying the first material layer (36, 536, 636, 736, 836, 936), the second bond component (40, 240, 340, 440) including a second material layer (46) adjacent the second conductive element (26) and a second protective layer (48) overlying the second material layer (46), and heating the first (30, 230, 330, 430, 1030) and second (40, 240, 340, 440) bond components such that at least portions of the first (36, 536, 636, 736, 836, 936) and second (46) material layers diffuse together to form the alloy mass (16, 116) joining the first (12, 112, 212, 312, 412, 512, 612, 712, 812, 912) and second (14, 114, 214, 314, 414) substrates with one another. There may be formed a plurality of first conductive elements (26, 126, 226, 326, 426, 526, 626, 726, 826, 926, 1022) on the first substrate (12, 112, 212, 312, 412, 512, 612, 712, 812, 912) and a plurality of second conductive elements (26, 126, 226, 326, 426) on the second substrate (14, 114, 214, 314, 414), joined by a plurality of conductive alloy masses (16, 116). The conductive alloy mass (116) may also surround and hermetically seal an internal volume.
摘要:
Provided are a chip package substrate and a method of manufacturing a chip package, the chip package substrate, including: an insulating layer on which via holes are formed; a circuit pattern layer formed on one surface of the insulating layer; a plated layer formed on one surface of the circuit pattern layer, wherein the plated layer comprises an Ni layer formed on the one surface of the circuit pattern layer, an alloy layer formed on the Ni layer, and an Au layer formed on the alloy layer. According to the present invention, in the plated layer, a thickness of the Au layer having a high material cost is reduced. Thus, it is advantageous that the amount used of Au is reduced, thereby enabling the total production cost of a product to be reduced.
摘要:
A method involves stacking a first chip, comprising high-speed circuitry formed using a first fabrication process, together with a wafer comprising multiple iterations of low-speed circuitry formed using a second fabrication process, hybridizing the first chip to the wafer so as to form electrical connections between the first chip and one of the iterations of the low-speed circuitry so as to form a hybridized unit and dicing the unit from the wafer.
摘要:
A method of joining contacts on two chips (4706, 4708), each having multiple contacts (4702, 4704), to each other involves maintaining a first of the chips at a first temperature, the first of the chips having a rigid electrical contact (4704) thereon, bringing a second chip, having an electrical contact (4702) that is malleable with respect to the rigid contact and matingly corresponding thereto, into contact with the first such that the corresponding rigid and malleable contact are brought together, locally raising the second of the chips to a local temperatur that is sufficiently high to cause material of the rigid and malleable contact to interdiffuse, interpenetrate or both, but below both a temperature that would cause the material to become liquidus and a fuse temperature, and allowing the second of the chips to cool to at least the first temperature.