Patent ID: 8877319

Claim:
A multi-layer composite structure comprising: a plurality of metal plates and plural wooden plates stacked together, wherein on a contacting surface of each metal plate and each wooden plate is applied an adhesive for sticking each metal plate and each wooden plate together; wherein a plurality of finely concaved patterns are ground on top surfaces and bottom surfaces of the plurality of metal plates by a grinding wheel to form a plurality of finely concaved patterns, wherein plural rough faces are sandblasted on the top surfaces and the bottom surfaces of the plurality of metal plates and surfaces of the plural finely concaved patterns, wherein plural tiny pores are formed on the plural rough faces by soaking in a chemical agent, wherein each tiny pore is a dead hole, wherein each tiny pore has a size parallel to the corresponding rough face, wherein the plural tiny pores are anodized to generate oxidation and then are back anodized to eliminate oxide, wherein plural micro-pores are formed on the top surfaces and the bottom surfaces of the plurality of metal plates and the surfaces of the plural finely concaved patterns, wherein each micro-pore has a size parallel to the corresponding rough face smaller than the size of each tiny pore, wherein the adhesive applied on the contacting surface of each metal plate and each wooden plate to sticks each metal plate and each wooden plate together, wherein the adhesive penetrates into apertures of the plural wooden plates to stick the plurality of metal plates and the plural wooden plates together, wherein the adhesive sticks the plurality of metal plates securely and enters into the plural finely concaved patterns and the plural rough faces to stick the plurality of metal plates and the plural wooden plates; and wherein the adhesive penetrates into the plural tiny pores and the plural micro-pores and then solidifies to generate plural support feet inserted into the plurality of metal plates.