Semiconductor sheets for the manufacture of semiconductor devices

“…The problem was overcome by the use of a heat shield (10). This supercooling plus reaction of the silicon with the crucible walls resulted in nucleation and growth from the sides of the crucible quickly stopping the controlled growth of the ribbon.…”

Section: Resultsmentioning

confidence: 99%

“…Manuscript received Feb. 10, 1965. This paper was presented at the Houston Meeting, Oct. [9][10][11][12][13] 1960.…”

Section: Acknowledgmentsmentioning

confidence: 99%

Growth and Morphology of Silicon Ribbons

Dermatis

Faust²,

John³

1965

J. Electrochem. Soc.

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A B S T R A C TRibbons of silicon were grown from a supercooled melt and examined by various techniques. From the morphology of the ribbons, dislocation patterns, twin structures, and microsegregation traces, it was shown that the basic growth sequence is similar to that given for germanium.Some differences are found, however, and these are described. Microsegregation traces were used to elucidate the growth sequence of degenerate ribbons.

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“…Rapidly growing crystal orientations are preferred. Depending on the growth velocity and initial seeding, even mono-crystalline material is possible [1].…”

Section: Type Imentioning

confidence: 99%

New Crystalline Si Ribbon Materials for Photovoltaics

Hahn¹,

Schönecker²,

Gutjahr³

2009

Advances in Materials Research

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Abstract. The objective of this chapter is to review, for photovoltaic application, the current status of crystalline silicon ribbon technologies as an alternative to wafers originating from ingots. Increased wafer demand, the current silicon feedstock shortage and the need of a substantial module cost reduction are the main issues that must be faced in the booming photovoltaic market. Ribbon technologies make excellent use of the silicon, as wafers are crystallised directly from the melt in the desired thickness and no kerf losses occur. Therefore, they offer a high potential to significantly reduce photovoltaic electricity costs when compared to wafers cut from ingots. Nevertheless, the defect structure present in the ribbon silicon wafers can limit material quality and cell efficiency. Ribbon GrowthTo provide an answer to the rapidly growing demand for cheap and easily available solar electricity, the photovoltaic industry is looking for more cost efficient and faster manufacturing processes for all steps of the value chain from silicon feedstock to crystallisation and wafering, cell processing and finally module fabrication. Silicon ribbons, as an alternative to silicon wafers that have been crystallised in the form of ingots and then cut into wafers, have, due to their higher silicon usage and potential for high production speed, significant advantages with respect to cost and throughput. However, a more complex technology and different wafer properties that often result in slightly lower conversion efficiencies are obstacles to be overcome.In principle, all ribbon processes have the characteristics that almost all silicon supplied into the process is converted into wafers. There is also no wafer cutting from a block, although in dependence upon the production method separation of larger sheets into wafers may be needed. Depending upon the type of crystallisation, silicon ribbon growth processes are either relatively slow processes, which can be run on rather low-cost equipment or high-speed processes operated with rather complex machinery.

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Semiconductor sheets for the manufacture of semiconductor devices

Cited by 34 publications

References 0 publications

Photovoltaic Silicon Crystal Growth

Photovoltaic Silicon Crystal Growth

Growth and Morphology of Silicon Ribbons

New Crystalline Si Ribbon Materials for Photovoltaics

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