WEET MF 1W How to Make Metal Film Precision Resistors and Production Process

Metal film resistors are a common electronic component, and their production process involves multiple steps.

Firstly, prepare the substrate. The substrate is usually made of ceramic or glass materials and needs to be inspected and cleaned to ensure a smooth surface and no contamination.

Next, perform bottom metal deposition. By using methods such as physical vapor deposition or chemical vapor deposition, a layer of metal is deposited on the substrate surface.Commonly used metals include nickel, titanium, etc. The purpose of this step is to improve the adhesion and conductivity of the metal film.

Then, prepare the membrane layer. Deposit the required metal materials (such as molybdenum, chromium, copper, etc.) onto the underlying metal through physical vapor deposition or chemical vapor deposition.The purpose of this step is to form the main body of the metal film.

Next, proceed with patterning. By using photolithography or electronic exposure methods, the upper part of the metal film is covered with photoresist or other photolithography materials, and then exposed and developed by a photolithography machine to remove unnecessary metal film parts and form the desired resistance pattern.

Next, clean and sinter. Clean the photoresist and other impurities with cleaning solution or solvent, and perform sintering treatment at high temperature to enhance the firmness and stability of the metal film.

Finally, perform encapsulation and testing. Encapsulate metal film resistors with encapsulation materials to protect them from external environmental influences.Then, conduct resistance testing to ensure that its quality and performance meet the requirements.

In summary, the production process of metal film resistors includes multiple steps such as substrate preparation, bottom metal deposition, film layer preparation, patterning, cleaning and sintering, encapsulation, and testing.These steps ensure the quality and performance of the metal film resistor, and ensure its normal use.