公开(公告)号：US20150255507A1

公开(公告)日：2015-09-10

申请号：US14201439

申请日：2014-03-07

Applicant: Applied Materials, Inc.

Inventor： Mahendra PAKALA ,  Mihaela BALSEANU ,  Jonathan GERMAIN ,  Jaesoo AHN ,  Lin XUE

IPC: H01L27/22 ,  H01L43/12 ,  H01L43/02

CPC classification number: H01L43/12 ,  H01L27/222 ,  H01L43/08

Abstract: A method for fabricating an MRAM bit that includes depositing a spacer layer that protects the tunneling barrier layer during processing is disclosed. The deposited spacer layer prevents byproducts formed in later processing from redepositing on the tunneling barrier layer. Such redeposition may lead to product failure and decreased manufacturing yield. The method further includes non-corrosive processing conditions that prevent damage to the layers of MRAM bits. The non-corrosive processing conditions may include etching without using a halogen-based plasma. Embodiments disclosed herein use an etch-deposition-etch sequence that simplifies processing.

Abstract translation: 公开了一种用于制造MRAM位的方法，其包括在处理期间沉积保护隧道势垒层的间隔层。 沉积的间隔层防止在后续处理中形成的副产物再沉积在隧道势垒层上。 这种再沉积可能导致产品失效并降低了制造成品率。 该方法还包括防腐损坏处理条件，以防损坏MRAM位的层。 非腐蚀性处理条件可以包括不使用卤素等离子体的蚀刻。 本文公开的实施例使用简化处理的蚀刻 - 沉积蚀刻序列。