Patent ID: 8054150

Claim:
A magnetic element comprising: a conducting winding structure; a first magnetic part having a first central post; a second magnetic part having a second central post; two first side posts disposed on two first edges of said first magnetic part; and two second side posts disposed on two second edges of said second magnetic part; wherein said conducting winding structure is sandwiched between said first magnetic part and said second magnetic part, said first central post is aligned with said second central post and both of said first central post and said second central post penetrate through said conducting winding structure, said first side posts are aligned and in contact with two corresponding third edges of said second magnetic part, said second side posts are aligned and in contact with two corresponding fourth edges of said first magnetic part, and no side post is disposed on said third edges of said second magnetic part nor said fourth edges of said first magnetic part, so that said first side posts and said second side posts are disposed outside said conducting winding structure and the overall height of said first central post and said second central post is less than the height of said first side posts or said second side posts, thereby an air gap is defined between said first central post and said second central post.