Advanced consulting and R&D in semiconductor and optical crystal growth. Mathematical modelling of crystallization physics, thermal field optimization, and defect engineering — for compound semiconductors, sapphire, and optical crystals.
StepFlow Tech & Consulting operates on a strict principle of intellectual property separation. Know-how, processes, and technical knowledge acquired during prior employment or at client facilities are never transferred, disclosed, or applied in work for other parties.
Every technology, process solution, and know-how developed for a client remains their exclusive property. It is never reused, adapted, or shared with any other party — under any circumstances.
Each solution is developed independently — from scratch — based solely on the client's own equipment, material system, and production specifications. No two solutions are alike.
Know-how and processes observed or developed at previous employers remain strictly confidential and are never disclosed or applied in any external consulting work.
StepFlow Tech & Consulting was founded by Dr. Dmitry Suptel, a leading specialist in semiconductor and optical crystal growth with over 25 years of hands-on experience in both industrial and research environments.
Our work is grounded in the rigorous mathematical description of physical processes at the melt and crystallization front — including step-flow dynamics, facet formation, defect nucleation, and thermal field behaviour inside growth equipment.
We bridge fundamental crystal physics with the practical demands of industrial production — helping clients eliminate defects, optimize yield, and develop next-generation growth technologies.
Diagnosis and elimination of crystal defects that reduce wafer yield — including twins, dislocations, inclusions, and polycrystalline breakdown. Root-cause analysis using crystallization physics.
Computational modelling of thermal fields inside hot zones, melt flow, and solidification front dynamics. Optimisation of furnace geometry and insulation to meet specification requirements.
Advanced description of faceted growth, step-flow mechanisms, and phase boundary dynamics. Modelling of facet stability, twin nucleation, and conditions for polycrystalline onset.
Development of processes for recycling production waste from crystal growth operations — recovering valuable semiconductor and optical materials from off-spec boules and kerf.
Development of synthesis technologies for new and complex semiconductor systems. Compound stoichiometry, phase diagram navigation, and precursor chemistry for III-V and II-VI materials.
Engineering of thermal insulation systems inside growth equipment. Tailored solutions for VGF, CZ, and FZ furnaces to achieve target temperature gradients and axial symmetry.
We welcome enquiries from semiconductor manufacturers, research institutions, and equipment developers seeking expert consultation in crystal growth technology. All engagements begin with a confidential discussion of your challenges.
Fill in the form below — every enquiry receives a personal response within 2 business days. An NDA can be signed before any technical details are exchanged.