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:
Oct. 12, 2021
Filed:
Mar. 06, 2020
Asti Global Inc., Taiwan, Taichung, TW;
ASTI GLOBAL INC., TAIWAN, Taichung, TW;
Abstract
An LED wafer, an LED wafer detection device and an LED wafer detection method are provided. The LED wafer includes a wafer base, a plurality of LED chips, a plurality of positive test circuit layers, a plurality negative test circuit layers, a plurality of positive test contacts, and a plurality of negative test contacts. Each LED chip has a positive contact and a negative contact respectively electrically connected to the corresponding positive test circuit layer and the corresponding negative test circuit layer. The positive test contacts are respectively electrically connected to the positive test circuit layers, and the negative test contacts are respectively electrically connected to the negative test circuit layers. Whereby, when inputting an electric current into the positive test contacts, and then outputting the electric current from the negative test contacts, each LED chip is excited to generate a light source.