Abstract: According to an exemplary embodiment, a method of forming a vertical device is provided. The method includes: providing a protrusion over a substrate; forming an etch stop layer over the protrusion; laterally etching a sidewall of the etch stop layer; forming an insulating layer over the etch stop layer; forming a film layer over the insulating layer and the etch stop layer; performing chemical mechanical polishing on the film layer and exposing the etch stop layer; etching a portion of the etch stop layer to expose a top surface of the protrusion; forming an oxide layer over the protrusion and the film layer; and performing chemical mechanical polishing on the oxide layer and exposing the film layer.

Abstract: A biodegradable plastic composition is provided. The biodegradable plastic composition includes a starch in a range from about 25% to about 50% by weight of the composition, a synthetic biodegradable resin in a range from about 10% to about 40% by weight of the composition, a synthetic resin with linear alkenes in a range from about 5% to about 15% by weight of the composition, an affinity agent in a range from about 8% to about 20% by weight of the composition, a coupling agent in a range from about 1% to about 3% by weight of the composition, and an additives in a range from about 1% to about 15% by weight of the composition. Further, a producing method of the biodegradable plastic also is provided.