Cobalt Iron Boron (CoFeB) Alloy Target

Cobalt iron boron (CoFeB) alloy target is an alloy target which composed of three elements: iron (Fe), cobalt (Co) and boron (B). The common ratio is Co:Fe:B = 60:20:20 (atomic ratio), but the specific ratio can be adjusted according to the customer's application requirements. Cobalt Iron Boron target has high saturation magnetic induction intensity, low coercivity and good soft magnetic properties. It is widely used in magnetic recording, magnetic sensors, optical coating and electronics. 

The density of Cobalt iron boron (CoFeB) alloy target is 7.8-8.2g/cm³, the curie temperature exceeds 800K, the saturation magnetization intensity reaches 1.0-1.5T, and it also has the characteristics of low magnetostriction coefficient (~10⁻⁶).

In terms of preparation process, vacuum induction melting combined with rapid cooling strip spinning technology is used to prepare amorphous thin strips, and then hot isostatic pressing (1000℃/150MPa) is used for densification. In order to maintain the amorphous characteristics, wire cutting precision machining is required, and the surface is polished to Ra<0.1μm. During sputtering deposition, the substrate temperature is required to be <100°C, the background vacuum is ≤5×10⁻⁷Torr, and the power density is controlled at 3-8W/cm² to prevent boron volatilization.

Raw material ratio:

High-purity Co (99.99%), Fe (99.98%), B (99.9%) are mixed according to the designed ratio

Smelting process:

Vacuum induction melting (VIM) or arc melting

Quick cooling strip method (preparation of amorphous thin strip)

Powder metallurgy:

Mechanical alloying + hot isostatic pressing (HIP, 1000°C/150MPa)

Precision machining:

Wire cutting molding (maintaining amorphous structure)

Surface polishing to Ra<0.1μm (reducing sputtering defects)

(1) Spintronic devices
Magnetic tunnel junction (MTJ): core material for MRAM storage cells
Spin-orbit torque devices: for low-power storage and logic operations
(2) Magnetic storage
Perpendicular magnetic recording media: CoFeB/MgO interface achieves high perpendicular anisotropy
Read/write heads: high-sensitivity soft magnetic materials
(3) Sensors
Magnetoresistive random access memory (MRAM)
Biomagnetic sensors (such as magnetic marker detection) 

CoFeB 40/40/20at%

CoFeB 40/40/20wt%

CoFeB 60/25/15at%

CoFeB 20/60/20at%

FAQ

Are you a factory or manufacturer?
A: Yes, we are a factory but we generally use our trading company to handle the business abroad. It will be more convenient to receive the remittance and arrange the shipment.

What is the delivery method?
A: Generally, we send cargo by UPS, DHL or FedEx. Also, we can send by sea to seaport or by air to the closest airport.

Why is your product so cost-effective?
A: We cut out the middlemen in the end-to-end manufacturing process and we obtain raw material directly from its source.

Do you do spot quality inspection or full inspection?
A: 100% full inspection for sure. All unqualified products are discarded.

How do you ensure your lead time?
A: From material preparation to machining and finally to a full inspection. Every stage of production is strictly monitored and controlled to give you an accurate delivery time.

What is the MOQ of Cobalt Iron Boron (CoFeB) Alloy Target?
A: Depends on quantity, generally, no MOQ limit.

How to pay for it?
A: A bank transfer (T/T) will be acceptable.

What is the delivery time?
A: around 7-20 days which depends on the quantity and production.

What is kind of the package?
A: Generally, we use a carton case or plywood case with protective material inside to ensure the save of cargo

What is the lead time?
A: from order placed to cargo receiving will take around 10-25 days.

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