The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 23, 2021
Filed:
May. 19, 2016
Stmicroelectronics S.r.l., Agrate Brianza, IT;
Federico Giovanni Ziglioli, Pozzo d'Adda, IT;
STMICROELECTRONICS S.R.L., Agrate Brianza, IT;
Abstract
Embodiments of the present disclosure are directed to flat no-lead packages with wettable sidewalls or flanks. In particular, wettable conductive layers are formed on the package over lateral portions of the leads and on portions of the package body, which may be encapsulation material. The wettable conductive layers may also be formed on bottom surfaces of the package body and the leads. The wettable conductive layers provide a wettable flank for solder to wick up when the package is mounted to a substrate, such as a PCB, using SMT. In particular, solder that is used to join the PCB and the package wicks up the side of the wettable conductive layers along a side surface of the package. In that regard, the solder is exposed and coupled to the side surface of the package at the wettable conductive layers, thereby allowing for a visual inspection of the solder joints. The wettable conductive layers are formed on the package after the package body has been formed. In one embodiment, the wettable conductive layers are printed on the package body and the leads by Aerosol Jet® technology.