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:
Sep. 30, 2003
Filed:
Mar. 07, 2001
Institut fuer Halbleiterphysik Frankfurt (Oder) GmbH, Frankfurt, DE;
Abstract
The invention relates to a vertical bipolar transistor and a method for the production thereof. The aim of the invention is to produce a vertical bipolar transistor and to disclose a method for the production thereof, whereby excellent high frequency properties can be obtained for said transistor using the simplest possible production technology involving an implanted epitaxy-free collector and only one polysilicon layer spread over a large surface and which can be easily integrated into a conventional mainstream CMOS process without epitaxially produced trough areas. It is possible to simplify technology, while at the same time improving the high frequency parameters of vertical bipolar transistors by reducing the parasitic lateral and vertical components of the resistance of the collector, by means of a self-adjusting transistor construction in conjunction with a special method of production, whereby a highly doped monocyrstalline base connection area surrounding the active base in a ring-like manner is removed in the region of the collector connection by reactive ion etching, together with the underlying less doped area of the collector or a part thereof.