Abstract: A nail gun includes a nail gun housing, a nail magazine detachably mounted in the nail gun housing and defining with the nail gun housing a nail crown receiving space and first, second and third nail leg receiving spaces, and a nail pusher for pushing a nail to a nailing position in the nail magazine, the nail pusher having a top portion positioned in the nail crown receiving space and first, second and third push portions respectively downwardly extended from two lateral sides and a second side of the top portion and respectively inserted into the first, second and third nail leg receiving spaces. Thus, a large contact surface area of the nail pusher can be abutted against the leg(s) of one of various types of nails to keep the nail accurately in the nailing position, avoiding tilting or any nailing errors.

Abstract: A method of manufacturing a multilayer printed circuit board of a built-in electronic device provides a substrate having a copper clad laminate and a first dielectric layer. The first dielectric layer is laminated onto the copper clad laminate and has a cavity for accommodating the electronic device. A second dielectric layer is laminated onto the substrate and electronic device to produce a base circuit board with an embedded electronic device. A build-up circuit layer is formed on the base circuit board. The first and second dielectric layers are made of a plastic material.

Abstract: A method of manufacturing a multilayer printed circuit board of a built-in electronic device provides a substrate having a copper clad laminate and a first dielectric layer. The first dielectric layer is laminated onto the copper clad laminate and has a cavity for accommodating the electronic device. A second dielectric layer is laminated onto the substrate and electronic device to produce a base circuit board with an embedded electronic device. A build-up circuit layer is formed on the base circuit board. The first and second dielectric layers are made of a plastic material.