摘要:
A lead frame for the manufacture of semiconductor devices having an offset die pad (57) positioned closer to a first carrier strip (59) of the lead frame than to a second carrier strip (61) of the lead frame. Die (42), such as memory chips, which are designed for end-only wire bonding, may be centred on the off-centre die pads. This enables bonding wires (50) to be used which are all substantially equal in length. Having the die centred also increases the efficiency of manufacture of semiconductor devices and increases the reliability of each semiconductor device.
摘要:
Disclosed is a semiconductor package with a high pin count. External contacts to the chip are provided by interdigitated leads (l3, l4 - l6, l7) formed from an upper (l5) and lower (l2) lead frame. The lower lead frame includes a paddle (ll) for mounting the chip (l0). The upper lead frame initially has its leads tied together (30-33) and a center portion is punched out to fit the size of the particular chip. The two lead frames are preferably coplanar in the area around the boundaries of the package encapsulant.
摘要:
In an integrated circuit package, the central "paddle" of the lead frame on which the semiconductor chip (17) is mounted comprises two separate, electrically isolated portions (10, 11) which extend beyond edges of the chip and which is each electrically connected to a different terminal pin of the package. External power is applied to these two chip support portions by means of which electrical power can be distributed to numerous areas (as desired) on the chip via bonding wires (23, 24) extending between the chip areas and the paddle portions.
摘要:
An assembly having an integral wire support (110) located between the contact pads (92, 97) of a semiconductor device (22) and a lead frame (20) for supporting wires (102) attached between the contact pads (97) of the semiconductor device (22) and the contact pads (47) of the lead frame (20).
摘要:
A ceramic chip carrier having a copper lead frame (3) bonded directly to a ceramic substrate (1) has a common rim (13, 23) connecting the tip portions (7) of the leads. The rim (13,23) is raised above the substrate (1) and does not bond to the substrate (1) and is removed after bonding. In one embodiment the rim (13) is of reduced thickness to space it from the substrate (1) and a perforated ground pad (10) may be provided which is connected to the rim (13) by tabs (14). In another embodiment the rim (23) is provided with extended portions (15) which permit bending the rim (23) away from the substrate without altering the relative positions of the tip portions (7).
摘要:
Interconnects for optoelectronic devices are described. An interconnect may include a stress relief feature. An interconnect may include an L-shaped feature.
摘要:
Characteristics of a semiconductor device are improved. A semiconductor device includes a coil CL1 and a wiring M2 formed on an interlayer insulator IL2, a wiring M3 formed on an interlayer insulator IL3, and a coil CL2 and a wiring M4 formed on the interlayer insulator IL4. Moreover, a distance DM4 between the coil CL2 and the wiring M4 is longer than a distance DM3 between the coil CL2 and the wiring M3 (DM4 > DM3). Furthermore, the distance DM3 between the coil CL2 and the wiring M3 is set to be longer than a sum of a film thickness of the interlayer insulator IL3 and a film thickness of the interlayer insulator IL4, which are positioned between the coil CL1 and the coil; CL2. In this manner, it is possible to improve an insulation withstand voltage between the coil CL2 and the wiring M4 or the like, where a high voltage difference tend to occur. Moreover, a transformer formation region 1A and a seal ring formation region 1C surrounding a peripheral circuit formation region 1B are formed so as to improve the moisture resistance.
摘要:
A method of making a packaged integrated circuit device includes forming a lead frame with leads that have an inner portion and an outer portion, the inner portion of the lead is between a periphery of a die pad and extends to one end of openings around the die pad. The outer portion of the leads are separated along their length almost up to an opposite end of the openings. Leads in a first subset of the leads alternate with leads in a second subset of the leads. The inner portion of the first subset of the leads is bent. The die pad, the inner portion of the leads, and only a first portion of the openings adjacent the inner portion of the leads are encapsulated. A second portion of the openings and the output portions of the leads form a dam bar for the encapsulating material.
摘要:
Power supply system (100) comprises vertically sequentially a QFN leadframe (101), a first chip (110) with FET terminals on opposite sides, a flat interposer (120), and a second chip (130) with FET terminals and the terminals of the integrated driver-and-control circuit on a single side. Leadframe pad (107) has a portion (107a) recessed as pocket with a depth and an outline suitable for attaching the first chip with one terminal in the pocket and the opposite terminal co-planar with the un-recessed pad surface. The interposer comprises metal patterned in traces separated by gaps; the traces include metal of a first height and metal of a second height smaller than the first height, and insulating material filling the gaps and the height differences; one interposer side attached to the leadframe pad with the first chip, the opposite interposer side attached to the terminals of the second chip.
摘要:
Disclosed is a leadframe (AR) for a semiconductor component (HB), comprising: - a recess (AS); - an electrically conducting terminal element (PF), located in the recess (AS), for establishing an electrical connection to the semiconductor component (HB); - an isolating element (IS) that is located in the recess (AS), mechanically connects the terminal element (PF) to the leadframe (AR), and electrically isolates the terminal element (PF) from the leadframe (AR).