Three-dimensional memory device with different thickness insulating layers and method of making thereof
First Claim
1. A three-dimensional memory device comprising:
- an alternating stack of insulating layers and electrically conductive layers located over a substrate;
memory stack structures extending through a first region of the alternating stack, wherein each of the memory stack structures comprises a memory film and a vertical semiconductor channel; and
support pillar structures extending through a second region of the alternating stack that is laterally offset from the first region,wherein each insulating layer includes a respective first insulating material portion having a respective first insulator thickness in the first region of the alternating stack and a respective second insulating material portion having a respective second insulator thickness that is greater than the respective first insulator thickness in the second region.
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Abstract
A three-dimensional memory device includes an alternating stack of insulating layers and electrically conductive layers located over a substrate, memory stack structures including a memory film and a vertical semiconductor channel and extending through a first region of the alternating stack, and support pillar structures extending through a second region of the alternating stack that is laterally offset from the first region. Each insulating layer includes a respective first insulating material portion having a respective first insulator thickness in the first region of the alternating stack and a respective second insulating material portion having a respective second insulator thickness that is greater than the respective first insulator thickness in the second region.
63 Citations
12 Claims
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1. A three-dimensional memory device comprising:
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an alternating stack of insulating layers and electrically conductive layers located over a substrate; memory stack structures extending through a first region of the alternating stack, wherein each of the memory stack structures comprises a memory film and a vertical semiconductor channel; and support pillar structures extending through a second region of the alternating stack that is laterally offset from the first region, wherein each insulating layer includes a respective first insulating material portion having a respective first insulator thickness in the first region of the alternating stack and a respective second insulating material portion having a respective second insulator thickness that is greater than the respective first insulator thickness in the second region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification