Yasuhisa Morishita

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Introduction: Ureilitic meteorites are ultramafic rocks with highly depleted REE abundance, while showing primitive signatures, such as abundant noble gases and oxygen isotopic heterogeneities. A lack of basaltic components among ureilitic meteorites is the major cause of our poor understanding of their evolution. Especially, chronological studies of(More)
The Si-Si surface activated bonding interface was observed by transmission electron microscopy by comparing conventional room temperature bonding to liquid nitrogen temperature bonding. As result, the thickness of intermediate layer at low temperature was 7.3 nm, compared to 7.6 nm of that at room temperature.
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