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公开(公告)号:US10279451B1
公开(公告)日:2019-05-07
申请号:US15942756
申请日:2018-04-02
发明人: Yue Liu , Yuhui Tang , Moris M. Dovek , Kowang Liu
摘要: A dual PMR writer is disclosed wherein the better writer at outer diameter (OD) skew is paired with a suspension after dynamic performance (DP) spin stand testing so that the better writer is the inner writer formed closer to a recording disk center than the other writer. Accordingly, lower read write offset is achieved at OD skew and better area density capability is realized. Preferably, there is a symmetrical or substantially symmetrical air bearing surface design after lapping and spin stand testing to afford flexibility in pairing an up facing (UP) head configuration with an UP suspension, or a down facing (DN) head configuration with a DN suspension to enable the better writer to be the inner writer. The dual PMR writer may have a dual dynamic fly height heater on each side of a center plane separating the two writers to improve write gap protrusion in the better writer.