Transfer film, transfer method using transfer film and electronic products manufactured using transfer film

A transfer film comprising:

• a base part;
• an adhesion part provided on one surface of the base part;
• an asymmetric first protrusion part protruded from the surface of the base part, accommodated inside the adhesion part and having at least a portion of which a thickness increases toward a first direction parallel to the surface of the base part,
• an asymmetrical second protrusion part protruded and formed adjacent to the first protrusion part to be accommodated inside the adhesion part and having a second inclined surface whose thickness decreases toward the first direction,
• wherein
• the first protrusion part is partitioned into a first region including a first portion of the first protrusion part and a second region including a second portion of the first protrusion part and having a weaker adhesive force than the first region, and a thickness of the first portion of the first protrusion part is greater than a thickness of the second portion of the first protrusion part,
• the second protrusion part is divided into a third region including a third portion and a fourth region including a fourth portion of the second protrusion part and having a weaker adhesive force than the third region, and a thickness of the third portion of the second protrusion part is greater than a thickness of the fourth portion of the second protrusion part,
• the first protrusion part and the second protrusion part are disposed at a predetermined space,
• one protrusion part corresponds to one element to be picked,
• an element is picked while the third region is lifted first in a picking process, and the element is placed while the fourth region is lifted first in a placing process,
• the first protrusion part includes a first inclined surface whose thickness increases toward the first direction, and
• a second projection region formed by projecting the second protrusion part onto one surface of the adhesion part contacts with a front end of the element based on the first direction during the picking process.