摘要:
A memory cell array includes a number of memory cells, each of the memory cells including a source and a drain region defined by corresponding bitlines within a semiconductor substrate. Each of the bitlines has a doped semiconductor region as well as a conductive region in direct electrical contact with the doped semiconductor region.
摘要:
A description is given of methods for collecting particles (1, 2) which are suspended in a liquid, including the following steps: providing the liquid containing the suspended particles (1, 2) in a compartment (10) having lateral surfaces (11), wherein at least one electrode (21) is arranged on at least one of the lateral surfaces (11), and generating high-frequency electric fields by means of the at least one electrode (21) so as to form at least one circulating flow (30), by means of which the particles (1, 2) are guided to at least one predetermined collecting area (40) in the compartment (10), wherein the flow (30) is formed in such a way that at least one branch of the flow runs along a longitudinal extent of the at least one electrode (21), and the flow (30) circulates about an axis (31) which is oriented perpendicular to the respectively adjacent lateral surface (11) with the electrode (21). Corresponding devices for collecting particles are also described.
摘要:
The invention relates to a measuring device and a measuring method for investigating particles which are suspended in a carrier liquid, including several measuring electrodes for carrying out electrical measuring of the particles. It is proposed that during electrical measuring, the particles be fixed in a field cage (4).
摘要:
The invention relates to a docking device (100) for retaining a fluidic microsystem (10), comprising a base plate (20) and a retaining frame (30), movable relative to the base plate (20) and used to fasten the microsystem (10) on the base plate (20). The retaining frame (30) is adapted to detachably receive the microsystem (10) and can be detached from the base plate (20) together with the microsystem (10). The device is also provided with a clamping device (40) with which the microsystem (10) on the retaining frame (30) can be pushed against the base plate (20). The invention also relates to methods for operating a fluidic microsystem (10) using said docking device (100).
摘要:
An ultra-miniaturized surface structure with controllable adhesion having extremely miniaturized (in the sub atomic range) planar electrode strips applied to the surface to which high frequency pulse trains may be applied to generate progressive or stationary standing waves. The electrodes in themselves are combined with dielectric insulating materials with controlled bio-compatibility. The type of electric drive, together with the properties of the surface layers that cover the electrodes, determines the adhesion properties of the surface to a large extent regardless of the used base material. Particle movement is gently influenced, so that for the first time it becomes possible to influence particles in highly physiological nutritive solutions.
摘要:
For the fixated cryopreservation of single living biological objects or s objects compiled in a given number (for example cells) a cryogenically cooled substrate (13) is jetted therewith in a enveloping solution in microdroplet form (12) from a storage vessel, for example by means of a microdroplet jetting device (11). The substrate is temperature-controlled via a coolant (15), the surface to be jetted being located in a gas atmosphere or in vacuum (14). The substrate surface is maintained at a temperature T1 resulting in freezing of the impinging microdroplet, the substrate surface being possibly supportingly microstructured and comprising sensing elements. By controlled movement of either the substrate or the microdroplet jetting device the microdroplets can be applied singly and in patterns in arrays freely selectable or predetermined by the structuring of the substrate. The substrate with the applied microdroplets and the cells frozen therein are stored and/or processed by a processing means (17) ablating the material or applying said material at temperatures T2 of down to -273.degree. C. In the cryogenic condition manipulations such as removal by mechanical ablation or addition of solutions or substances to the surface of the substrate can be undertaken. During thawing the substrate surface is brought to a temperature T1 above the freezing point of the enveloping solution and the microdroplet array thawed in a predefined manner.
摘要:
The invention relates to a method for handling particles (1, 2) that are suspended in a carrier liquid (3). The method includes the following steps: the carrier liquid (3) is received with the particles (1, 2) in a liquid siphoning device (10) including at least one siphoning opening (11), electrical and/or magnetic separating fields are generated in the liquid siphoning device (10), a sedimentation movement of the particles (1, 2) is created in the liquid, each particle having a sedimentation speed that depends on the action of the separating fields on the particle (1, 2) and the particles (1, 2) forming a plurality of particle fractions (5, 6) according to the sedimentation speeds thereof, and the particle fractions (5, 6) are separately extracted from the liquid siphoning device (10). The invention also relates to a handling device (100) for handling suspended particles (1, 2).
摘要:
A method of discharging a fluid flow with suspended microparticles from a fluidic microsystem (10) is described, whereby the fluid flow converges with at least one output flow to form a discharge flow at the end of a discharge channel (14) of the microsystem, and the discharge flow is delivered through a conduction element (19). A microsystem with a flow output device for implementation of this method is also described.
摘要:
The invention relates to a microfluidic system, in particular in a cell sorter, including a first carrier power supply (1) which is used to supply a first carrier flow having particles (4) suspended therein, a first carrier power output line (15) which is used to withdraw at least one part of the carrier flow having particles (4) suspended therein, a process chamber (3) which is used to examine, observe, manipulate and/or select the particle (4). The first carrier power supply (1) flows into the process chamber (3) when the first carrier power output line (15) is discharged from the process chamber (3). According to the invention, at least one second carrier power supply (2) flows into the process chamber (3) in order to supply a second carrier flow having particles (5) suspended therein. The invention also relates to a corresponding operational method.
摘要:
The invention relates to a sample depositing device, particularly for a cell sorter, comprising a sample supply (38, 39) for supplying samples to be deposited and comprising a sample storage element (36) for storing the samples. Said sample storage element (36) has a number of sample containers for storing the samples separately. The invention provides that the sample storage element (36) is mounted in a displaceable manner in order to select a sample container whereas the sample supply (38, 39) is stationary.