A new designed carrier head for chemical mechanical polishing is disclosed. A pin is disposed through the first and second hinges so as to rotatably attach the first and second jaws. A grasping structure, such as a hook, is attached to one end of a longer rod and a cooperating stabilizing structure is connected to the end of a shorter rod. The present invention also provides a method for compressing or decompressing a data file using an abbreviation procedure, as well as a referencing procedure. The terminal of the electronic component has a protruding portion which protrudes from the second surface of the insulation layer.