摘要:
A chip carrier 90 and a process of assembling a chip carrier are disclosed. The carrier used for mounting a chip comprises a copper or copper base alloy component 92 having a thin interface layer or refractory oxide layer 93 on a surface thereof. The surface and the interface or oxide layer have an indentation formed therein for receiving the chip 102. A metallic circuit pattern 98 for electrical connection to the chip is bonded to the interface or oxide layer and insulated from the copper or copper base alloy by the interface layer or refractory oxide layer. A seal 104 is provided for enclosing the chip to the indentation. Another embodiment of the invention includes a circuit board structure comprising a circuit board device 24 having a first coefficient of thermal expansion. A chip carrier 90 is provided having a second coefficient thermal expansion of substantially the same value as the first coefficient of thermal expansion. The chip carrier has electrical leads 100 soldered to the circuit board whereby thermal cycling of the circuit board structure does not substantially stress the bond between the solder, leads and circuit board. Other embodiments of the present invention include both leadless and leaded hermetic semiconductor packages and innovative relationships between the packages and printed circuit boards.
摘要:
A semiconductor device has a semiconductor element 14 encased in a hollow ceramic package. The portion of the package at which the semiconductor element is disposed is formed from a SiC-based substrate 11 which contains Be or a compound of Be or is provided with a thin SiO 2 layer capable of reacting with glass and with a glass layer 10 or with a thick film circuit on the thin SiO 2 layer.
摘要:
In a leadless chip carrier (LCC) type semiconductor device (10), soldering pads for making external electrical connection with a printed circuit board by soldering may be densely made by using exposed surfaces (16) of metal filled in holes (13) in place of metallization patterns formed by the screen printing method.
摘要:
A chiop carrier 90 and a process of assembling a chip carrier are disclosed. The carrier used for mounting a chip comprises a copper or copper base alloy component 92 having a thin refractory oxide layer 93 on a surface thereof. The surface and the oxide layer have an indentation formed therein for receiving the chip 102. A metallic circuit pattern 98 for electrical connection to the chip is bonded to the oxide layer and insulated from the copper or copper base alloy by the refractory oxide layer. A seal 104 is provided for enclosing the chip to the indentation. Another embodiment of the Invention includes a circuit board structure comprising a circuit board device 24 having a first coefficient of thermal expansion. A chip carrier 90 is provided having a second coefficient thermal expansion of substantially the same value as the first coefficient of thermal expansion. The chip carrier has electrical leads 100 soldered to the circuit board whereby thermal cycling of the circuit board structure does not substantially stress the bond between the solder, leads and circuit board. Other embodiments of the present invention include both leadless and leaded hermetic semiconductor packages and innovative relationships between the packages and printed circuit boards.
摘要:
Connection leads (32, 35) of a semiconductor device extending from a chip carrier housing (31) for connection with external circuitry are arranged in a plurality of rings, one within the other. The leads (32), in the outermost ring, are composed of surface connection leads to be electrically connected to the uppermost layer (41) only of a multilayer printed circuit board (40) and the connecting leads in the inner ring or rings are composed of lead pins (35) to be inserted into and be electrically connected to plated through holes (35) of the multilayer printed circuit board (40) for connection to other layers (43) of the board (40).
摘要:
A stackable microelectronic package includes a first microelectronic die attached to and electrically connecting with a first substrate. A second microelectronic die is attached to the first die on one side, and to a second substrate on the other side. Electrical connections are made between the first die and the first substrate, between the second die and the second substrate, and between the first and second substrates, e.g., via wire bonding. The electrical connecting elements are advantageously encased in a molding compound. Exposed contacts on the first and/or second substrates, not covered by the molding compound, provide for electrical connections between the package, and another package stacked onto the package. The package may avoid coplanarity factors, can be manufactured using existing equipment, allows for intermediate testing, and can also offer a thinner package height.