Sharp edges! Solid State UV laser source 355nm marking SIM card

The SIM card generally refers to the subscriber identification card of a digital cellular mobile phone. There is a string of numbers on the back of the SIM card, called the ICCID of the mobile phone card, which is the identification code of the integrated circuit card of the mobile phone card, which is equivalent to the ID card of the mobile phone number. Mobile phones are getting smarter and more refined after continuous updates and iterations. The internal space is optimized very thoroughly, and the space for the SIM is getting smaller and smaller. The current mainstream SIM card types include Micro SIM and nano SIM.

According to the data, the size of the Micro SIM is 15mm*12mm, while the nanoSIM is smaller than a fingernail, with a size of about 12mm*9mm. It is necessary to mark a series of ICCID identification codes, as well as pictures and texts such as mobile operator logos on such a narrow area. In addition, the SIM card involves privacy and property security. It is required that the imprint on the card surface is not easy to be erased and tampered with. Various requirements Really test the craftsmanship of marking.

And if you observe the mainstream SIM card, you will find that it is essentially a microchip with a contact circuit integrated on the substrate of a plastic card. If the traditional inkjet method is used to mark, because the plastic material of the substrate has a strong adhesion to the ink Limited, it is easy to cause marks to be erased or even changed, and it is also easy to blur during use.

It is necessary to mark multiple information on 12mm*9mm, and the marking must be clear and permanent, and the plastic substrate and chip must not be damaged. Laser marking with the Solid State UV laser source 355nm satisfies this "must-have-not" process requirement.

The process of 355nm UV marking is "cold" processing. Because 355nm UV light has high single-photon energy, it can directly break the molecular bonds on the surface of the plastic substrate, so that the surface material is instantly vaporized and evaporated to achieve peeling. This process is called. For the "photolithography" effect, it is non-heat treatment, so there is no need to worry about thermal melting or scorching; non-contact processing during laser marking, no external force, can better protect fragile chips.

The beam quality of Solid State UV laser source 355nm is high (M2<1.2), and the UV light is easy to focus. The diameter of the spot after focusing is only more than 10 microns, and the line width can be achieved when marking. About 0.5mm, it is no problem to mark numbers, LOGO and other graphic information on the nano SIM of 12mm*9mm, with high definition, sharp edges, and permanent, not easy to tamper and smear.