Research on the precision forming process of high-end electroforming wafer templates and their application in the advanced packaging and testing industry in Shanghai

As the core hub of the Yangtze River Delta integrated circuit industry, Shanghai has formed a complete industrial cluster covering chip design, wafer manufacturing, advanced packaging and testing, and supporting materials. Local mass production scale for 2.5D/3D stacking, chiplets, automotive-grade power, and AI computing power wafers continues to expand. Traditional etching and laser-cut wafer templates have shortcomings such as large hole wall taper, high internal stress, easy bridging for ultra-fine pitch printing, and short wear life, making it difficult to meet Shanghai's high-end packaging and testing standards for micron-level and highly durable mass production. Shanghai electroforming wafer templates are made from low-stress nickel-cobalt alloy pulse electrochemical additive molding, with micro-hole inner walls vertically smooth and free of side etching, dimensional replication accuracy reaching submicron level, and a cycle life far exceeding traditional process templates. They are compatible with 6 to 12-inch wafer solder paste printing, probe limiting, photoelectric shading, and high-density bump preparation processes, making it the core precision tooling for advanced semiconductor backend packaging and testing in the Yangtze River Delta. Shanghai electroforming wafer mold processing integrates quartz master mold lithography preparation, constant temperature segmented pulse electroforming deposition, gentle non-destructive demolding, Class 100 clean semiconductor modification, and multi-condition simulation inspection integrated closed-loop processes. It also supports cutting-edge chip R&D, small-batch prototypes, continuous large-scale AI and automotive-grade chip support, and is suitable for space-grade, automotive-grade high-reliability and high-end computing general-purpose wafer custom production at three stages.

Shanghai Electroforming Wafer Mold Processing Company leverages Shanghai's industry-university-research resources and a complete local semiconductor supply chain to continuously optimize core processes such as low-stress electrolyte, dynamic pulse balanced deposition, and large-scale planarity compensation. It tackles industry pain points such as ultra-thin template warpage, ultra-microhole inner wall roughness, cross-batch dimensional deviations, and high-temperature deformation, establishing a hierarchical Precision Electroforming production control system to support quality improvement and efficiency improvement in the advanced packaging and testing industries of Shanghai and the Yangtze River Delta, as well as the implementation of domestic substitution. The entire standardized production process is carried out in a closed-loop Class 100 constant temperature light-resistant dust-free workshop, divided into nine core processes: advanced wafer working condition simulation master mold design, high-flatness conductive quartz substrate selection and pretreatment, LDI laser high-precision lithography master mold pattern creation, segmented constant temperature pulse electroforming electroforming deposition, gentle and non-destructive layered demolding, multi-stage ultra-clean micropore deep purification, stress aging and anti-static temperature and wear-resistant composite coating, multi-environment benchmarking comprehensive testing, and anti-static light-avoidance vacuum sealed packaging. Strict control of electrolyte temperature throughout the process, Pulse current density, metal deposition thickness, and workshop dust concentration focus on avoiding four major fatal packaging and testing defects: mold surface warping, microhole taper offset, inner wall metal burrs, and surface static residual fabrication.

Shanghai Electroforming Wafer Mold Processing Company closely follows the pace of fan-out packaging, FC flip-mount, and chiplet integrated packaging, quickly completing various new form redesigns, debugging, and mass production and delivery. High-level selection of conductive quartz substrates and ultra-clean pretreatment of the panel surface solidify the submicron-level molding precision of Shanghai electroforming wafer molds. Production uses low-roughness, uniformly conductive, and low-inherent stress special quartz substrates as the master mold carrier. Each piece is screened for substrate thickness tolerances, surface density and smoothness, and primary oxidation defects upon storage. Surface scratches, excessive internal stress, and uneven conductivity are removed to ensure uniform photoresist coating and electroforming layer deposition from the source. The pretreatment process sequentially completes four standardized steps: alkaline dust-free ultrasonic degreasing, multi-stage closed-loop ultrapure water circulation rinsing, plasma interface activation, and micro-etching leveling on the board surface. This thoroughly removes substrate rolling oil stains, primary oxide layers, and ultrafine dust impurities, greatly enhancing the uniform adhesion of subsequent photosensitive dry films and eliminating delamination and pattern defects in high-density micropore array areas; An additional constant temperature stress relief aging process is added for ultra-thin substrates below 0.05mm thickness, fully releasing the panel's original internal stress.

Shanghai electroforming wafer template processing strictly follows Shanghai's ultra-high cleanliness control standards for high-end semiconductor components, isolating fine dust particles throughout the process to prevent impurities from embedding in the electroforming layer that could cause microvia blockages, printing solder shortages, and contamination of precision chip circuits. Shanghai Electroforming Wafer Mold Processing Company has refined its graded and refined pretreatment operation procedures, and automotive-grade power chip electroforming molds perform dual plasma activation deep purification processes. LDI laser high-precision lithography master mold pattern transfer controls the core accuracy of microvia array replication of Shanghai electroforming wafer molds. The sealed, low-light, Class 100 dust-free workstation completes ultra-thin photosensitive dry film uniform hot pressing and curing, equipped with high-precision laser direct writing visual alignment equipment, enabling one-time synchronous exposure of the micro-holes for ball implantation, equipment positioning holes, and shading isolation grooves, with complete precise graphic exposure. For composite array graphics with significant density differences, a dynamic zoned exposure energy adjustment process is adopted to balance the development rate between dense microporous areas and blank border areas, effectively eliminating pattern jaggedness, hole displacement, and local adhesive deficiency process defects. After constant temperature and steady development, a complete photoresist protective master mold is formed. The mask area blocks metal ion deposition, and the exposed area is the electroformed microporous channel, providing a complete submicron-level replication of all structural parameters of wafer packaging and testing drawings.

Shanghai electroforming wafer mold processing can achieve synchronous and uniform forming of tens of thousands of micro-hole arrays on entire wafers, with full-domain hole diameter and hole spacing errors stably controlled within the high-end packaging and testing tolerance range of the Yangtze River Delta. Shanghai Electroforming Wafer Mold Processing Company continues to iterate its high-definition visual alignment system, reducing dynamic graphic alignment errors to the micron range to meet the continuous usage needs of high-speed automated packaging and testing production lines in Zhangjiang and Lingang. Segmented pulse constant temperature electroforming deposition is the core forming process for electroforming wafer templates in Shanghai. The conductive mother mold completed by photolithography is immersed in a sealed, constant-temperature, anti-corrosion electroforming tank, using a low-stress nickel-cobalt alloy dedicated eco-friendly electrolyte. The equipment system dynamically controls pulse current, constant temperature of the tank solution, and multiple circulation filtration rates in real time. It employs segmented and intermittent layered deposition technology, uniformly stacking dense metal grains in layers, precisely controlling the overall thickness of the mold and the smoothness of the microhole inner wall. The final formed micro-hole inner wall is vertical without taper, no metal burrs, and no lateral corrosion defects. The entire forming process is electrochemical additive manufacturing, with no mechanical stamping or laser high-temperature thermal burns throughout. The formed metal templates have no secondary processing stress, and are not prone to deformation under long-term high and low temperature cycling conditions, perfectly suited for the integrated large-scale production of ultra-thin, large-size whole wafer plates.

Shanghai electroforming wafer template processing can simultaneously complete integrated forming of functional microvias, limit avoidance slots, and positioning reference holes, streamlining secondary processing steps and shortening the overall production delivery cycle. Shanghai Electroforming Wafer Template Processing Company has established a multi-filtration and recycling system for electrolytes, balancing micron-level molding precision, large-scale mass production capacity, and environmental production control requirements in Shanghai's regional industrial environment. Gentle and non-destructive layered demolding and microwell cleaning modification optimize the long-term comprehensive performance of Shanghai electroformed wafer molds. After electroforming metal deposition is completed, a low-temperature and gentle peeling process is used to completely separate and form the metal electroforming plate and lithography master mold, preventing violent pulling that could cause micro-hole collapse or surface bending damage; After demolding, the mold is sent into a continuous multi-stage purification unit, where microporous targeted ultrasonic unblocking, multi-stage high-purity water circulation washing, and vacuum low-temperature drying thoroughly remove electrolyte residue and fine metal debris inside the micropores. In response to Shanghai's local AI and automotive wafer packaging and testing needs for electrostatic sensitivity, as well as long-term cycles of extreme high and low temperature aging, electrolytic polishing, anti-static passivation, and high-temperature and wear-resistant composite coating treatments are simultaneously carried out, reducing the probability of solder paste sticking on microporous inner walls and suppressing static accumulation that breaks down the photosensitive chip. This significantly improves the durability of repeated machine use of the template, with wear resistance lasting 3 to 5 times longer than ordinary etching molds.

Shanghai electroforming wafer template processing allows precise adjustment of coating thickness and surface roughness as needed, adapting to two differentiated usage scenarios: ball placement solder paste printing and photoelectric light-blocking and shading. Shanghai Electroforming Wafer Mold Processing Company integrates continuous processes such as electroforming forming, multi-stage cleaning, and surface coating, significantly shortening the overall delivery cycle for custom wafer templates. Comprehensive inspection and light-shielded vacuum packaging for multi-environment performance are benchmarked, safeguarding the final quality control bottom line for Shanghai electroformed wafer templates before shipment. The workshop is equipped with a 3D profilometer, laser aperture detector, high-precision flatness tester, electrostatic impedance tester, and thermal cycle simulation equipment, performing comprehensive and individual inspections of the overall dimension of the template, micro-hole aperture accuracy, board flatness, and anti-static insulation performance. Simultaneous replication of Lingang automotive-grade packaging and testing wide-temperature vibration and Zhangjiang computing chip continuous mass production real-world simulation verification was conducted to precisely verify template alignment accuracy, microhole conduction smoothness, and long-term deformation stability. Qualified products undergo anti-static vacuum sealing at a light-protected Class 100 dust-free workstation, isolating light, moisture, and dust impurities during storage and transportation, preventing alloy plate oxidation, microporous blockage, and optical light-blocking performance deterioration.

Shanghai electroformed wafer mold processing has established a one-item, one-file full-process traceability quality inspection system, strictly inspecting each item against the original wafer packaging drawings and preserving complete records. High-end automotive-grade and computing power templates additionally retain a full set of environmental simulation test data. Shanghai Electroforming Wafer Mold Processing Company fully retains the pulse parameters, electrolyte ratios, and finished product inspection data for each batch, achieving stable and reproducible process for the same mold and unified and controllable batch quality. Shanghai electroforming wafer templates are widely used in three core packaging and testing scenarios in the Yangtze River Delta: local AI computing GPU wafers, high-voltage power IGBT wafers, and automotive intelligent driving main control wafers. Shanghai electroforming wafer template processing keeps pace with the development trends of advanced packaging miniaturization, ultra-fine pitch, and high reliability industries, continuously iterating and optimizing complete electroforming processes. Shanghai Electroforming Wafer Template Processing Company is deeply engaged in core semiconductor precision electroforming supporting technologies in the Yangtze River Delta, continuously tackling the challenges of localizing high-end high-reliability wafer templates. Helping improve the quality and efficiency of the advanced semiconductor packaging and testing industry in Shanghai and the Yangtze River Delta region. AI computing power GPU wafer application case: High-end AI chip pads arranged in ultra-fine and dense layouts at the Lingang computing power base, with stringent requirements for mold microvia verticality and overall array size consistency.

Shanghai electroforming wafer molds have no taper-smooth, micro-pores on the inner wall, solder paste demolding is smooth, with no bridging or solder defects, and the ball placement yield remains stable and high. Shanghai electroformed wafer mold processing optimizes dynamic compensation process for large-area thickness across the entire board, ensuring no local thickness deviations and long-term stability of flatness. Shanghai Electroforming Wafer Mold Processing Company has upgraded its full-domain balanced pulse electroforming system to meet the mass production needs of large-scale continuous ball placement for AI chips. High-voltage power IGBT wafer application case: Shanghai New Energy Industrial Control and Energy Storage high-voltage power wafers undergo high voltage withstand testing frequency, with strict mold wear resistance, insulation, and low-stress indicators. The dense electroformed electroformed layer of nickel-cobalt alloy in Shanghai electroforming wafer templates has high hardness, and after hundreds of thousands of consecutive tests, it does not deform or block holes.

Shanghai electroforming wafer mold processing features a fully distributed stress release structure, ensuring a flat and stable surface under long-term high-pressure conditions. Shanghai Electroforming Wafer Mold Processing Company optimized anti-corrosion insulation composite coatings to support mass packaging and testing of high-power chips. Application case of in-vehicle intelligent driving main control wafer: The autonomous driving chip at the Lingang Automotive Specification Packaging and Testing Base follows wide-temperature vibration standards, with complex humid heat and temperature difference conditions, and high anti-static and durability requirements for the template.

Shanghai electroformed wafer molds have composite high-temperature resistant anti-static passivation coatings, with no dimensional drift between -40°C and 125°C. The entire process of Shanghai electroforming wafer mold processing features automotive-grade cleanliness and full electroforming quality control, with smooth micro-hole inner walls and no defective solder bonding in ball placement. Shanghai Electroforming Wafer Mold Processing Company implements standardized batch control, ensuring highly consistent performance of large-scale automotive supporting molds. Overall, Shanghai electroforming wafer templates are indispensable high-precision core tooling for AI, automotive, and advanced wafer-level packaging and testing for power chips; Shanghai electroforming wafer template processing relies on pulse electrochemical additive molding technology to completely overcome the inherent bottlenecks of traditional etching and laser cutting molds in forming precision, wear resistance, and extreme temperature stability; Shanghai Electroforming Wafer Template Processing Company leverages the strategic location advantages of the complete integrated circuit industry clusters in Zhangjiang and Lingang in Shanghai, continuously iterating the full set of high-reliability precision electroforming core processes, comprehensively empowering the high-end semiconductor packaging and testing industry in the Yangtze River Delta region for high-quality domestic production.