Method of aligning and placing an electronic component and a system for aligning and placing an electronic component
The present disclosure relates to a technology of manufacturing electronic components, especially semiconductor components with an irregular shape. The present disclosure provides an improved alignment method and system which may be used in cases, where features on a top surface of the semiconductor component or device are not sufficient due to process limitations and where a bottom surface might also not show any alignment correlation with the top surface.
1 . A method of aligning and placing an electronic component, the electronic component having a first, top surface side and a second, bottom surface side opposite to the first surface side, the method comprising steps of
a. illuminating, using a light source unit, the electronic component with light which transmits through the electronic component, so that at least one feature of the electronic component is visible from the first surface side and at least one feature is visible from the second surface side;
b. obtaining, using a first camera unit, an image of the electronic component containing image data of the at least one feature present visible from the first surface side and at least one feature visible from the second surface side;
c. calculating, based on the image data, of a correction value wherein the correction value is indicative of a position of the second surface side of the electronic component with respect to the first surface side of the electronic component;
d. transferring the electronic component to an assembling station;
e. calculating of a position of an adjusted placing area of the electronic component by adjusting a placing area, which is an area in the assembling station where the second side of the electronic component must by placed, with the correction value;
f. placing the electronic component, using a second camera unit, by obtaining an image containing image data of the first surface side of the electronic component and an assembly device structured to place the electronic component, so that the first surface side of the electronic component is located in the adjusted designated area.
2 . The method according to claim 1 , wherein the light source unit emits light in the infrared or in the visible wavelength spectrum.
3 . The method according to claim 2 , wherein in step a, and step b, the electronic component is positioned between the light source unit and the first camera unit.
4 . The method according to claim 2 , wherein in step a, and step b, the light source unit and the first camera unit are pointing towards the same direction.
5 . The method according to claim 2 , wherein in step c a temple matching algorithm or one or more machine learning algorithms is used.
6 . The method according to claim 2 , wherein the first camera unit and/or the second camera unit has an axis that is perpendicular to the first surface side and/or the second surface side of the electronic component.
7 . The method according to claim 2 , wherein the electronic component is placed on an integrated circuit substrate.
8 . The method according to claim 1 , wherein in step a, and step b, the electronic component is positioned between the light source unit and the first camera unit.
9 . The method according to claim 1 , wherein in step a, and step b, the light source unit and the first camera unit are pointing towards the same direction.
10 . The method according to claim 1 , wherein in step c a temple matching algorithm or one or more machine learning algorithms is used.
11 . The method according to claim 1 , wherein the first camera unit and/or the second camera unit has an axis that is perpendicular to the first surface side and/or the second surface side of the electronic component.
12 . The method according to claim 1 , wherein the electronic component is placed on an integrated circuit substrate.
13 . The method according to claim 1 , wherein the electronic component is a sapphire component or any other type of semiconductor component.
14 . A system for aligning and placing an electronic component comprising:
a light source unit;
a first camera unit configured to obtain an image of an electronic component in a first measuring position, the electronic component having a first, top surface side and a second, bottom surface side opposite to the first surface side, the image containing image data of the at least one feature visible from the first surface side and at least one feature visible from the second surface side;
a second camera unit configured to obtain an image of the first surface side of the electronic component in a second measuring position;
a transportation unit configured to transport the electronic component from the first measuring position to the second measuring position;
a processing system configured to calculate, based on the image data, of a correction value, wherein the correction value is indicative a position of the second surface side of the electronic component with respect to the first surface side of the electronic component, and to calculate the position of an adjusted placing area of the electronic component by adjusting a placing area, which is an area within the second measuring position where the second side of the electronic component must by placed, with the correction value.
15 . The system according to claim 14 , further comprising a measuring unit configured to hold the electronic component in the first measuring position.
16 . The system according to claim 14 , further comprising a holding unit configured to hold the electronic component in the second measuring position.
17 . The system according to claim 14 , further comprising an assembly device configured to place the electronic component on the placing area.
18 . The system according to claim 14 , wherein the measuring unit is configured to hold the electronic component between the light source unit and the first camera unit.
19 . The system according to claim 14 , wherein the light source unit and the first camera unit are pointing toward a same direction.
20 . The system according to claim 14 , wherein the first camera unit and/or the second camera unit has an axis that is perpendicular to the first surface side and/or the second surface side of the electronic component.