Photetched Microelectronic Lead Frames and Lids


Microelectronics is just too indispensable, this is due to the fact that, you will definitely find semiconductor chips in almost every electronic component you see around. Semiconductor chips have epitomised the revolution that is sweeping through the tech world especially when you consider the CPU chips that are available these days. These chips made up of over two billion transistors that are packed onto a die that is about 1-inch square.

However, the chip can be connected to the outside world by means of photo etching the metal contact device. The leadframe is an important part of the chip, it’s the lattice of conductive material, which is normally made of copper, and to which the semiconductor die is bonded. The leadframe is responsible for the delivery of multiple interconnect points to the die. Note that,  automated wire bonding machines are used to make the physical connections.

Normally leadframes are produced from a metal whose thickness is not more than .010” and doesn’t also have components that wider than its thickness. However note that when you consider making parts that are free of burrs and distortion the ideal solution will always be the photo etching.

Etched microelectronics leadframes 

Usually etched microelectronics leadframes include simple DIP to complex and fragile high density QFN that are made from a copper alloy that is extremely active like the C194.

Note that when it comes to microelectronics leadframes, there are many brands on the market. Choose the one that consists of sets of nickel-iron-cobalt alloys, which are commonly known as “glass-to-metal sealing” alloys.

How to Choose a Photo Chemical Machining Supplier

Choosing a supplier for photo chemical machining is not as easy as getting machine shops or sheet metal fabricators. This is due to the fact that, there are few numbers of machine shops in that part of the world, unlike shop metal fabricators.

When contacting a supplier one has to lay good emphasis on the suppliers’ environmental compliance, quality, and service, safety, waste treatment programs and not also forgetting the equipment replacement cycles.

Since environmental compliance is usually a state-level activity that governs liquid and solid waste products, you have to ensure that the supplier is certified by the federal Environmental Protection Agency (EPA).  It shouldn’t just stop there, but it also should be confirmed that the suppliers’ facility is regularly evaluated by environmental consultants to ensure that the expected compliance procedures are being accurately and consistently followed. These procedures should include, training on compliance and safety for the company’s new staffs and also a mandatory yearly retraining for all production staffs.

In conclusion, it is strongly advised that, before making up your mind on a particular photo chemical machining supplier to use, ensure that you request and embark on an inspection of the suppliers’ plant, this will enable you make informed decisions about the supplier.


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