Conclusion

Nous avons ici présenté les caractéristiques et les conditions de fabrication des matériaux qui composent notre structure bipolaire. Les caractéristiques de ces matériaux, et en particulier leurs propriétés électriques (dopages, mobilités), déterminent les limitations auxquelles nous ferons face par la suite, lors de l'optimisation de la structure de couche.

lors de la croissance de la base, était crucial pour avoir une bonne homogénéité des caractéristiques de nos TBHs, ce qui est nécessaire à la fabrication de circuits sur des surfaces importantes. Par ailleurs, la réalisation de structures TBH plus performantes nécessite une optimisation de la croissance de la base aux très forts niveau de dopage. En particulier, le problème de la passivation du carbone par l'hydrogène devra être étudié en détail, et résolu par la mise au point d'un recuit compatible avec une bonne qualité de matériaux dans la base. Enfin, une méthode précise de contrôle de la gradualité de composition dans la base a été expérimentée.

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