Carrier substrate and fabricating method thereof, flexible substrate and fabricating method thereof, and display device

A fabricating method of a carrier substrate, comprising;

• forming a base comprising a first face and a second face opposite to the first face;
• forming a bonding portion comprising a magnetic particle, the magnetic particle comprising a first portion and a second portion;
• and
• providing the bonding portion on the second face of the base, wherein:
• the magnetic particle is capable of rotating under an action of an external magnetic field;
• the first portion is capable of weakening a binding force between the bonding portion and a flexible base when the first portion faces a side away from the first face;
• and
• the second portion is capable of enhancing the binding force between the bonding portion and the flexible base when the second portion faces the side away from the first face.

A fabricating method of a flexible substrate, comprising:

• providing a carrier substrate, comprising:
• a base comprising a first face and a second face opposite to the first face;
• a bonding portion disposed on the second face, the bonding portion comprising a magnetic particle, the magnetic particle being capable of rotating under an action of an external magnetic field, wherein the magnetic particle comprises a first portion and a second portion such that, when the first portion faces a side away from the first face, a binding force between the bonding portion and a flexible base can be weakened, and, when the second portion faces the side away from the first face, the binding force between the bonding portion and the flexible base can be enhanced;
• applying a first external magnetic field to the carrier substrate to induce rotation of the magnetic particle, such that the second portion faces the side away from the first face;
• combining the flexible base to the second face of the base through the bonding portion;
• forming a functional layer on the flexible base to obtain the flexible substrate;
• applying a second external magnetic field to the carrier substrate to induce rotation of the magnetic particle, such that the first portion faces the side away from the first face;
• and
• separating the flexible substrate from the carrier substrate.