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. 20, 2024
Filed:
Mar. 03, 2022
Unimicron Technology Corp., Taoyuan, TW;
Ming-Hao Wu, Taoyuan, TW;
Shih-Lian Cheng, New Taipei, TW;
Unimicron Technology Corp., Taoyuan, TW;
Abstract
A printed circuit board stack structure includes a first printed circuit board, a second printed circuit board, and a filling glue layer. The first printed circuit board has at least one overflow groove, and includes first pads and a retaining wall surrounding the first pads. The second printed circuit board is disposed on the first printed circuit board, and includes second pads and conductive pillars located on some of the second pads. The conductive pillars are respectively connected to some of the first pads to electrically connect the second printed circuit board to the first printed circuit board. The filling glue layer fills between the first and the second printed circuit boards, and covers the first pads, the second pads, and the conductive pillars. The retaining wall blocks the filling glue layer so that a portion of the filling glue layer is accommodated in the overflow groove.