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:
May. 16, 2006
Filed:
Feb. 18, 2005
Takeshi Okada, Osaka, JP;
Hiromi Nakanishi, Osaka, JP;
Akira Yamaguchi, Osaka, JP;
Yoshiki Kuhara, Osaka, JP;
Takeshi Okada, Osaka, JP;
Hiromi Nakanishi, Osaka, JP;
Akira Yamaguchi, Osaka, JP;
Yoshiki Kuhara, Osaka, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
An optical communications module in which electrical crosstalk is reduced. The term 'optical communications module' represents a surface-mounting-type optical tranceiver, transmitter, or receiver module. The optical communications module has a following structure. (a) An Si substrate carries at least one signal-transmitting section comprising an LD, at least one signal-receiving section comprising a PD, or both together with other components. (b) An insulating substrate is bonded to the back face of the Si substrate. (c) A separating groove separates the Si substrate along the or each boundary line between the sections in order to prevent an AC current flowing through the Si substrate. To attain this object, the separating groove is provided from the top surface of the Si substrate to some midpoint of the insulating substrate. This structure reduces the electrical crosstalk between the signal-transmitting section and the signal-receiving section, between the signal-transmitting sections, and between the signal-receiving sections.