Abstract: A memory device includes a memory cell array including memory blocks and a peripheral circuit coupled to the memory cell array. Each memory block includes memory strings each including dummy cells and select transistors, bit lines coupled to the memory strings, select lines including first select lines and second select lines, and one or more dummy word lines. Each select line coupled to the select transistors. The first select lines are closer to the bit lines than the second select lines. Each dummy word line is coupled to the respective dummy cells. The dummy word lines include a first dummy word line adjacent to either the first select lines or the second select lines. The peripheral circuit is configured to apply a turn-on voltage to all the first select lines, and apply a program voltage to the first dummy word line.

Abstract: The present invention discloses a biodegradable complex oxygen barrier film and its preparation method and application. The biodegradable complex oxygen barrier film disclosed by the present invention is constituted of at least two support layers and a barrier layer which is deposed between each two support layers. The support layer is selected from at least one of the following substances: polylactic acid, poly(butylene succinate), polycaprolactone, poly(adipate-butylene telephthalate), poly(?-hydroxybutyrate) and poly(?-hydroxybutyrate-valerate); the barrier layer which is deposed between the each two support layers is same or different, the barrier layer is selected from any one of the following: poly(propylene carbonate) and nano montmorillonite modified poly(propylene carbonate).

Abstract: The present invention relates to improvement of the brittleness and cold flowability of a carbon dioxide-propylene oxide copolymer (PPC). The invention provides a blend comprising 50 to 98 parts by weight of a PPC; 2 to 50 parts by weight of a poly(butylenes succinate) (PBS) or poly(butylene succinate/adipate) (PBSA); 1 part by weight of a maleic anhydride, and 0.5 to 3.0 parts by weight of SiO2 and a method for producing the same. Compared with the pure PPC, the elongation rate at break of the blend of the invention increases by 3 to 15 times while the tensile strength maintains at 30 MPa or more. The blend of the PPC and PBSA can keep its dimension stably at 70° C., while the blend of the PPC and PBSA can keep its dimension stably at 55° C. No viscous flow occurs at these temperatures.