Abstract: A memory device for extending addressable array space by incorporating virtual and physical memory arrays is disclosed. When extra storage space beyond a physical memory array is needed by a controller of the memory device, the storage space may be provided by extending the address space using a virtual array. The memory device incorporates the use of an extra row address bit to increase the addressable space, whereby the extra bit is utilized to address virtual rows in the virtual array. Spare or redundant physical memory elements utilized for memory repair may be programmed to a virtual address space for the virtual memory array. When a memory device operation is activated, the extra row address bit is set to high, and the virtual row address matches with a spare or redundant memory element, the virtual row in the virtual array space is activated for performance of the operation.

Abstract: Apparatus and methods for page-based soft post package repair are disclosed. Based on data stored in a storage element, an address may be decoded to a prime row, a row-based redundant row, or a page-based redundant row. A match logic circuit may determine whether the address corresponds to a defective prime row and generate a match signal. A decoder can select a redundant row to be accessed instead of a prime row in response to the match signal indicating that the address data corresponding to the address to be accessed matches defective address data stored in a volatile memory. A page-based redundant row allows for page-by-page substitution for defective memory, allowing functional portions of memory to continue to be used.

Abstract: Principal members of structures are manufactured as foldable assemblies of like size and shape structural members, foldable for handling, packaging, shipping, and storage, and unfolded into their respective principal member configurations. Each like size and shape structural member has its opposite end surfaces formed on a sixty degree bias, whereby one longitudinal edge surface is longer than the other opposite edge surface, thereby creating opposite trapezoidal side surfaces. Each of these members has two spaced holes formed along its centerline, and each of these holes is equally spaced from a respective bias end. Regarding relative design dimensions, the respective longitudinal centerline length of each like size and shaped structural member is given the formula dimension, L, then the space between holes, X, is equal to 0.464 L, and the space from each hole to the centerline end, Y, is equal to 0.268 L.

Abstract: Principal members of structures are manufactured as foldable assemblies of like size and shape structural members, foldable for handling, packaging, shipping, and storage, and unfolded into their respective principal member configurations. Each like size and shape structural member has its opposite end surfaces formed on a sixty degree bias, whereby one longitudinal edge surface is longer than the other opposite edge surface, thereby creating opposite trapezoidal side surfaces. Each of these members has two spaced holes formed along its centerline, and each of these holes is equally spaced from a respective bias end. Regarding relative design dimensions, the respective longitudinal centerline length of each like size and shaped structural member is given the formula dimension, L, then the space between holes, X, is equal to 0.464L, and the space from each hole to centerline end, Y, is equal to 0.268L.