This application relates to a metal coating method for plastic outer part requiring robustness. In the metal coating method, first, provide a plastic outer part as a motion assistance tool. Thereafter, a cold plasma treatment is performed to introduce a polar functional group to a surface of the plastic outer part by treating the plastic outer part with cold plasma. Next, a metal coating layer is formed on the surface of the plastic outer part treated with the cold plasma by an electroless plating method. Thereafter, an adhesive strength improvement process of improving an adhesive strength between the metal coating layer and the plastic outer part to 1,000 g/cm.sup.2 or more by heat treatment of the plastic outer part with the metal coating layer thereon is performed.

Implementations of a method of electroless deposition may include providing a semiconductor substrate including a first largest planar surface and a second largest planar surface; forming a backmetal layer on the second largest planar surface; attaching a tape over the backmetal layer; and electroless depositing a metal layer on a pad included on the first largest planar surface. The method may include, after electroless depositing, removing the tape; and after removing the tape, baking the semiconductor substrate.

Devices and methods for metalizing temperature sensitive materials including fabrics are provided. Contemplated method begins with a step of applying a catalyst solution on the temperature-sensitive material to form an at least partially catalyst-coated substrate. Then the catalyst-coated substrate is incubated at a relatively low temperature. Optionally, in some embodiments, the low temperature incubated substrate is incubated at a relatively high temperature. Then, a layer of an electroless metal is deposited on the at least partially catalyst-coated substrate using an electroless metal deposition technique.