First, a trench penetrating first conductive layers and interlayer insulating layers is formed. Each word line is connected to some memory cells. The spacer means is fully contained between the upper and the lower plate. The composition may further comprise mineral oil, antioxidant, colorant, a processing aid and stabilizer and mixtures thereof. The tubular leader includes an annular wall extending between an interior surface and an exterior surface, and a clasp having a first portion disposed between the interior surface and the exterior surface of the annular wall and a second portion extending out of the annular wall and adapted to secure the suture against the annular wall.