of implementing the principles and scope of the present invention thus the following description is illustrative only and not limiting note the followings that apply to all of new designed p and n contact pad layout of the present invention 1 the dimensions of all of drawings are not to scale 2 the p and n contact pads in each figure may have different shapes other than what shown in the figures 3 p contact pads and n contact pads may be interchanged and the current flow reversed and then the leds are still function 4 quantity of p and n contact pads of leds of the present invention may vary depending on the sizes of the leds and p and n contact pads the area of n contact pad s is much smaller than that of p contact pad s although separations between p and n contact pads are not shown in fig2 a 3 a 4 a 4 b 4 c 4 d 5 a 6 a 7 a 7 b 7 c 8 a 9 a and 9 d p contact pads and n contact pads in all of leds of the present invention are separated electrically by mesa edges mesa s is formed by a mesa etch process mesa is only showed in fig2 b and 3 b since the space limitation the current spreading layer on top.