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Mechanically bridged SMD interconnects for electronic devices

專(zhuān)利號(hào)
US11744020B2
公開(kāi)日期
2023-08-29
申請(qǐng)人
Texas Instruments Incorporated(US TX Dallas)
發(fā)明人
Kyle Brent Norell; Claude Albert Fernandez; Charles Allen DeVries
IPC分類(lèi)
H05K3/22; H05K1/18; H05K1/11; H05K3/28; H05K3/34
技術(shù)領(lǐng)域
smd,inductor,bridged,package,die,electronic,substrate,tie,sip,molded
地域: TX TX Dallas

摘要

An electronic device includes a package substrate, at least one integrated circuit (IC) die including a substrate having a semiconductor surface including circuitry electrically coupled to bond pads positioned onto contact pads on a top surface of a package substrate. At least one surface mount device (SMD) component including at least a first terminal and a second terminal is on the package substrate positioned lateral to the IC die. There is at least one SMD interconnect electrically connecting to at least one of the first terminal and the second terminal to the bond pads. The SMD interconnect includes a portion of a tie bar that extends to an outer edge of the electronic device.

說(shuō)明書(shū)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Each mechanically bridged SMD interconnect 100 with only one identified in FIG. 2A includes a first SMD interconnect 105 and a second SMD interconnect 110 that are mechanically connected together by tie bars 112 that are positioned (placed) so that the tie bars 112 are over the saw streets 215 shown including on the saw street's 215 center-line between molded in-process electronic device units 240 on the electronic device strip 200. As noted above, the package substrate 205 can comprise a PCB, leadframe, or an MIS.

Following molding in the typical case of a molded electronic device, the SMD interconnect is overmolded, and its top surface is then typically exposed (such as by using grinding, film assist molding, or laser ablation) to create a solderable contact area(s) for connecting the SMD component. There is generally then a solder deposition step or deposition of another electrically conductive material such as metal filled epoxy, or sintered silver deposition in the contact area of the SMD interconnect.

To create an electro-mechanical connection the SMD component is placed to make contact to the contact areas of the SMD interconnect and the electro-mechanical connection is established between the SMD interconnect and the SMD component. The SMD interconnect is electrically and mechanically connected to metal traces on the package substrate which as described above is generally molded, and finally the exposed device pads of the package substrate (generally on a bottom side) are generally connected to a host substrate, for example to a PCB.

權(quán)利要求

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