layiq

/la·yiq/adjective

worthy; deserving; fitting; suitable.

A role, opportunity, or path that merits attention, time, and pursuit.

Plasma Dry Etch Engineer at Absolics Inc | LAYIQ

Develop and qualify plasma etch, PVD seed deposition, and plasma ablation processes for RDL build up and interconnect structures
Help establish process flows that enable control of film uniformity, required via or trench step coverage and taper/sidewall profile, and layer-to-layer adhesion across the various plasma-based sub processes
Establish recipes and tune plasma chemistry and tool parameters to optimize etch selectivity and minimize defects (micro-masking, residue, undercut)
Perform root-cause and failure analysis on dry-process defects using SEM, XPS/AES, and electrical metrology
Assess plasma-induced damage risk (charging, UV effects) on dielectrics and downstream reliability
Collaborate with wet process and plating teams to ensure clean handoff of seed layers and trench/via structures
Required Skills
Hands-on experience with plasma etch process development (RIE, ICP, or barrel plasma) in a semiconductor or packaging environment
Direct experience with PVD sputter deposition of seed layers (Ti, TiW, Ta, Cu) including thickness uniformity, step coverage, and adhesion control
Experience with plasma-based dielectric ablation techniques/descum on organic or inorganic dielectrics (ABF, PBO, PSPI, polyimide)
Working knowledge of plasma chemistry fundamentals (O₂, CF₄, SF₆, Ar, N₂ chemistries) and their etch selectivity tradeoffs
Proficiency with vacuum system fundamentals: chamber pressure control, RF/ICP power coupling, gas flow control, end-point detection
Metrology and characterization skills: SEM, profilometry, XPS or AES for surface composition, four-point probe for film resistivity
DOE design and statistical analysis for process optimization (Minitab, JMP, or equivalent)
Root-cause and failure analysis experience for etch defects (micro-masking, undercut, residue, via taper control)
Preferred Skills
Experience with plasma descum/etch-back for via clean prior to metallization (organic dielectric residue removal)
Familiarity with PECVD or ALD for inorganic dielectric or barrier films (SiN, SiO₂, SiCN)
Experience tuning trench taper angle, sidewall profile, and CD bias for fine-pitch micro structures (≤10 µm)
Knowledge of dry plasma Ti seed removal as an alternative to wet etch (selectivity to underlying Cu RDL)
Familiarity with plasma uniformity modeling, chamber matching, or tool-to-tool variation reduction
Cross-process integration experience linking dry etch outcomes to downstream plating or CMP performance
Experience with reliability impact assessment of plasma-induced damage (charging, UV exposure effects on dielectrics)
Education
Ph.D. in Materials Science, Electrical Engineering, Chemical Engineering, Physics, or related field preferred
M.S. with 3+ years of relevant industry or research experience considered

Plasma Dry Etch Engineer

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